Qualcuno ti regala metà prezzo
Inserisci questo codice nell’app allo sblocco. Non è legato a te né a questo telefono.
Un telefono che lavora
come un vero strumento.
Signal Collector registra di continuo i dati di sensori, radio e rete che il telefono riesce a raggiungere, direttamente nel telefono — senza archiviazione cloud e senza che i dati misurati lascino il dispositivo.
Riprese reali · Pixel 10a
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Una misurazione in corso. L’anello mostra satelliti, reti e sensori man mano che arrivano.
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La scelta di che cosa misurare. Ogni sorgente è una riga che dice che cosa registra.
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Avvio, azzeramento e stop, con sopra durata, distanza e numero di record.
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La parte bassa del pannello: che cosa fa ogni sorgente e il file che esce dal telefono.
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Impostazioni: invio al proprio server, unità e che cosa succede dopo lo stop.
Test interno
La prossima versione, prima che ce l'abbia lo Store.
Ogni build passa dal test interno prima di andare in produzione. Entra con l’account Google con cui è connesso il telefono e l’aggiornamento arriverà come tutti gli altri.
Ambito dell’MVP
Una sessione.
Tutto il contesto.
- 01GPS, GNSS e sensori del dispositivo
- 02Reti mobili: LTE / 5G / 3G / 2G
- 03Wi‑Fi, Bluetooth e contesto di rete
- 04Mappatura continua di internet su Wi‑Fi e rete mobile
A che cosa serve
Ogni caso finisce
in un file.
Uno strumento di misura non si vende con l’elenco delle sue sorgenti, ma con la domanda a cui risponde. Sei delle dodici situazioni per cui l’app è stata costruita: ogni volta una camminata e, alla fine, un file.
Il punto morto nella sala riunioni
Attraversi il piano con il telefono in tasca e detti una nota a ogni porta. Ne esce la portata secondo per secondo, l’AP a cui il telefono era davvero agganciato e una stanza al posto di una lite tra due reparti.
Un drive test senza furgone
Entrambe le SIM in scansione, GPS al secondo, il telefono bloccato sul cruscotto. Ogni cambio di tecnologia, Cell ID o PCI diventa un evento, così gli handover escono localizzati al metro.
Un rilievo dove il GPS non dà nulla
In un magazzino il cielo è un tetto. Segni ogni corsia con una foto dal mirino dell’app e raccolga AP, collegamenti MLO e distanze RTT: una mappa di copertura prima che si compri il primo AP nuovo.
Sensori che parlano da soli
Decine di termometri BLE in un edificio, nessuno accoppiato. Ci passi accanto e la loro temperatura, umidità e tensione della pila arrivano con un nome e in unità SI, accanto ai byte da cui sono nate.
Una prova per il proprietario
Dieci minuti di cammino danno un file con marca temporale, posizione, potenza del segnale e fotografie delle stanze. «Il segnale prende dappertutto» diventa un’affermazione verificabile.
Un cliente che non vuole il cloud
Misuri come sempre e consegni sul suo S3, WebDAV o SFTP — oppure consegni un file. Le foto e le note vocali non toccano mai la galleria del telefono, così l’NDA resta firmabile.
Un lavoro che si può
guardare.
La versione 1.5.1 porta tutte e dodici le lingue in ogni installazione, lascia vedere all’opera un’esportazione lunga o un Azzera e aggiunge un taccuino sciolto per punti, foto e prove prese senza una misura in corso.
Lingue che ci sono davvero
Google Play prima consegnava solo le lingue che il telefono aveva al momento dell’installazione, così la scelta della lingua per app offriva il ceco e le altre senza testi dietro. Tutte e dodici le traduzioni ora arrivano in ogni installazione.
Una cometa sul tasto
Scarica, Condividi e Azzera durano da secondi a minuti su una misura grande. Ora una cometa corre lungo il bordo del tasto, con la coda che cresce con la parte finita, e una riga viva sotto dice quanto è fatto, da quanto sta girando e all’incirca quanto manca. Lo spazio libero compare prima che inizi la scrittura: ambra quando è poco, rosso quando l’esportazione non ci starebbe.
Un taccuino sciolto
Punti di rilievo, foto, note vocali, il test una tantum di internet e un ciclo di portata Wi-Fi non hanno più bisogno di Avvia. Senza una misura in corso finiscono in un record separato senza collettori, senza wake lock e senza scalare dall’ora gratuita, con una scheda propria, un file da condividere proprio e un proprio Svuota.
Condividere dall’icona, controlli di sistema
Tenga premuta l’icona dell’app quando la misura è ferma e Condividi sta accanto ad Avvia; apre l’app e avvia subito l’esportazione. Interruttori, campi di testo, scelte e messaggi ora sono controlli standard di Android: i tasti e lo strumento restano come erano.
Nothing lost
on the way out.
Version 1.5.0 adds no new key. It goes over everything that could cost a measurement its data — a Reset under a stray thumb, a point number used twice, an export torn in half by a second export — and closes each one, with a test that keeps it closed.
A Reset that asks first
The first touch on Reset deletes nothing. It opens a dialog that names what would go: the measurements, the photos and the voice notes. Cancel keeps everything; only a confirmation wipes. A thumb that brushes the key in a corridor no longer ends a day's work.
Points keep their numbers
Stop a measurement, start it again, mark a point: it gets the next number, not a repeat of one already in the file. The same holds for photo and voice marks, so two records never share one point index and the export stays unambiguous.
An export in one piece
Export takes a single atomic snapshot of the database, and two export requests at once queue instead of tearing one archive. The manifest is computed from the bytes that actually went into the archive, with a SHA-256 for every file. You get a readable archive or a plain error — never a silent torso.
Failures that stay failures
When the writer loses a batch, Stop cannot turn the run into a success. Encrypted Eddystone telemetry stops showing up as plausible plain numbers. Dual-SIM attribution, WPA3-only networks, probe time budgets and the microphone handoff are hardened, and the expandable cards tell TalkBack what they are.
Started without
opening it.
Version 1.4.0 puts Start and Stop where the hand already is — the quick settings shade and the app icon — and lets a marked point carry a photo and a voice, so what a corridor looked like leaves together with the numbers.
A tile in the shade
Start and Stop in the quick settings shade, within reach from any app and over the lock screen, where a widget cannot go. Over a secured lock it unlocks first — what it starts is location with a microphone. It measures with whatever the app measured with last, so one key never starts two different measurements.
Shortcuts under the icon
A long press on the app icon is the only control that is always on the home screen, so it offers the one thing that makes sense now: Start while nothing runs, Stop and Mark point once it does. The gate the launcher walks through is locked with a token no other app can read.
A photo and a voice at the point
A marked point can carry a photo taken through the app's own viewfinder, or a spoken note of up to ten minutes. The media never touch the phone gallery: they sit in the app's private storage and leave only through an export, which becomes a single tar.gz with a SHA-256 for every file.
Settings you can take with you
A new phone set up like the old one, without walking through two dozen sources by hand. Passwords go into the backup only if you ask, and only after a fingerprint, a face or the screen lock. The licence and the free hour never travel in it.
The data, open
to be looked at.
Version 1.3.0 puts the keys on the home screen, opens the measured rows inside the app, lets the controls be carried to the edge of the display, and starts reading sensors that are not in the phone at all.
Keys on the home screen
Three widgets that need no app opened first: a point mark with your own labels, a key that starts a saved set of sources, and a tile showing what one source is collecting. Each key keeps its own copy of what it starts, so a preset switched in the app later changes nothing on the home screen.
Rows you can read on the spot
Browse records opens the raw rows of the last measurement: filter by type and time, search the payload, and a sequence number that holds across the whole file. Marking and hiding is crossing out in the printout — the stored measurement and the export are untouched.
Keys carried to the edge
Hold Start, Reset or Stop and drag it to the bottom edge of the display; there it stays put while you scroll anywhere. Let go outside a berth and the key swings back with an overshoot as big as the distance it travelled.
Sensors that are not in the phone
BTHome, Ruuvi, ATC and pvvx, Eddystone telemetry. Read straight from the Bluetooth scan that is already running: nothing to pair, nothing to connect, no new permission. The values land named and in SI units, beside the bytes they came from.
A panel you can
put your thumb on.
Version 1.2.0 turns the screens into the front panel of an instrument. Switches light up as a whole, keys sink into their base under the thumb, and colour is left to mean a reading — everything else is grey.
Switches that light up as one
The switch is a rocker from a switchboard, cast from translucent red plastic. Switched on, the whole rocker glows instead of a dot in the corner; the I/O marking stays readable in both positions and the rocker always leans to the side that applies.
Keys that stand on a base
Start, stop and the export keys sit on their own base and a press sinks them into it, the same as the buttons here on the site. Haptics answer in the same order: a click going down, a quieter clack coming back.
Grey panel, colour that means something
The panel is neutral grey, so every colour on it is a reading: green for controls and for running, amber for warnings, red for stopping. A screen grid with divisions and dashed axes lies under the content.
Half the download
The release build is shrunk and optimised by R8, which took the bundle from 8.3 MB down to 4.3 MB, and the outdated library Google Play kept reporting is raised through the services that pull it in.
Edges instead
of pebbles.
Version 1.1.0 stops the app looking like a sketch. Shapes go to the right angle, measured values get a dial typeface, and selections become rows that say what each option means.
Sharp edges and a dial typeface
Cards, fields and buttons keep at most two pixels of rounding, and measured values are set in a face where every digit is the same width — a column of numbers no longer dances under the eye. Spacing sits on a four-point grid.
Rows with a description, not pills
Technologies, presets and targets are rows with the current value on the right. On a source with parameters, tapping the row switches it and the chevron opens its settings — a pill could not tell those two apart.
Units say what they changed
Switching units used to close the menu and leave no trace. The dialog now says what it switched to, where it shows up, and that the export stays in metres.
Out of testing,
into the world.
Version 1.0.0 is the first public release. The instrument itself is unchanged; what is new is that anyone can install it, try it for an hour before paying, and read the screens in their own language.
An hour of measuring, on the house
Every phone gets one hour of measuring time a year, split across as many measurements as you like — the tool is meant to be tried in the field, not from a screenshot. The remaining time and the date it comes back are shown right above the Start button.
Bought once, not rented
Unlocking is a single in-app purchase at the Google Play price for your country. No subscription, no expiry, and it follows the account onto every other phone you sign in to.
Permissions explained before they are asked
The first launch no longer opens with a stack of system dialogs. A screen says what each permission is for — and that location is what Android ties cells and Wi-Fi to — and the system asks only after you press the button.
Screens in your language
The app and this site speak a whole range of languages, chosen by the phone or set for Signal Collector alone. The export never follows: it stays in SI, UTC and English column names, so two files from two countries are still one dataset.
Ready for the world
and for the Store.
Version 0.10.0 completes the move to the production identity, adds full English and US units, closes the release blockers and gives the instrument a calmer, more precise visual system — without changing how it is operated.
English and Czech, neither one a bolt-on
Text is no longer produced inside the collection layer, and errors are no longer recognised by their wording. The language can be switched for the app alone, and an English phone never gets half-Czech screens. Numbers follow the locale; the export deliberately stays stable.
Metres, feet and miles
Units can follow the phone automatically, or be forced to metric or imperial in the settings. Only the screen and the notification are converted; the database and the scientific export always stay in SI.
A release with no silent traps
The production bundle requires the upload key, targets Android 16 / API 36 and carries the final identity app.signalcollector. Corrected permission checks close the crashes that followed a revoked permission, and the updated SSH client brings security fixes.
Around the globe
runs time itself.
Inside the globe sits only what has a bearing. Quantities without direction got their own bands outside the horizon, the operator composes the instrument themselves — and measured data can finally leave the phone by a route other than the share sheet.
Four quantities in the ring
Noise, temperature, pressure and now light. The angle along a band is time, not bearing — one minute split into seconds, so the head of the trace sweeps like a second hand with a gap behind it where values have aged out of the minute.
You compose the view
The middle button switches off whatever the cursor rests on. A switched-off row stays in the list with its value, only struck through: the filter changes the picture, not the measurement.
Data can leave on their own
The gear icon gained S3, WebDAV and SFTP destinations. Passwords are encrypted with a key from the Android Keystore, an address without https is rejected, and the server key fingerprint is verified.
You can see
where the signal came from.
The pulsing background circle gave way to a globe of the sky. Satellites sit where they actually are — and anything without a direction lights the whole ring instead of inventing a bearing.
Satellites in their real place
Android reports azimuth and elevation for GNSS only, and the app has recorded them since day one — there was simply nowhere to see them. Colour separates the constellation, size and brightness carry C/N0, a filled dot counts towards the fix. Verified on a Pixel 10a: 20 satellites from four constellations, 14 in the fix.
What has no bearing lights the whole horizon
Wi‑Fi gives strength, not azimuth; Bluetooth gives none either, and cells report only their identity. Samples without direction therefore ripple the entire ring rather than a sector — a sector would claim the signal came from there. The ripples also rotate, so not even the tallest of them points anywhere.
It tilts with the phone, not just turns
Lying face up it looks into the zenith, held upright it looks at the horizon — and what was near the horizon moves behind the phone. Collapsed, the card leaves a flat compass with a needle to north: calm, no flicker.
Scrolling that
never jumps away.
While hiding, the header used to take part of the gesture for itself and the content was re-measured under the finger. Now it only observes the scroll and takes nothing from it.
Content follows the finger the whole time
The finger used to drag while the page stood still until the header had collapsed — and on reversing direction it expanded again first. The header now sits above the content and takes no part in scrolling; it simply moves away, taking the status row with it.
Nothing is re-measured mid-scroll
It hides by offsetting at draw time, not by changing its height, so the content inset stays constant. Measured on a Pixel 10a: 0.30 % janky frames and no missed vsync across ten drags over the threshold where the header switches.
It returns the moment you pull down
Direction decides, not position — you do not have to scroll back to the top to get the header. Because it also returns mid-page, it got an opaque backdrop; otherwise the title would sit on top of the card text.
A scan that does not
pretend to be a measurement.
Android throttles Wi‑Fi scans and keeps handing back the same result meanwhile. The app used to write it down again and again — and the export then claimed a measurement every five seconds.
A repeated scan is recognisable
Every attempt records the state FRESH, THROTTLED or UNCHANGED together with the age of the result; per-AP records are written only for a fresh scan. Without that, the data could not tell you where measuring actually happened — and for a coverage map, that is the whole difference.
Six times denser sampling
Measured on a Pixel 10a: with throttling on, 70 rejected attempts against 45 fresh scans; with it off, zero rejections and a fresh scan every 4.2 s at the median. At walking pace that is one sample every 6 metres instead of every 40.
Points on a floor plan, throughput per network
GPS gives no position indoors, so a place marker was added — you stop, mark a point, walk on. And a new optional source visits the Wi‑Fi networks you list one by one and measures their actual throughput, not just their signal.
Every second
gets its own row.
Continuous internet measurement no longer leaves holes in the timeline. When measuring is impossible, the reason is written down — and a Wi‑Fi network that is gone is recognised at once, not ten minutes later.
A second without a measurement is still a row
A capacity burst or a manual speed test holds the link for several seconds, and the data used to be left with a gap — a full minute in the worst case. Now it says BUSY, naming who held the link. A missing second cannot be told apart from a failed measurement; a written one can.
A dead Wi‑Fi is recognised immediately
After losing Wi‑Fi, the app stayed bound to a network that no longer existed, and over six hundred samples claimed the internet was not answering. The handle is now dropped as soon as the system stops knowing about it, and the app waits for a new Wi‑Fi with internet.
A sample knows which Wi‑Fi it came from
SSID and BSSID were added to the quality record — until now only the direct Wi‑Fi source knew them, and measured quality could not be tied to a network. Android placeholder values (RSSI −127, frequency −1) are also left empty instead of looking like readings.
From your pocket you can tell
how the run is going.
The notification for a running measurement no longer just says “collecting data”. It shows the duration and the record count, refreshes every five seconds and speaks up when data stops being stored.
Time and count in the notification
On a dark screen you see 00:02:43 · 29,880 records instead of a terse line. The duration is pure collection time, the same as on the status card — a pause between Stop and Start does not count towards it.
Data loss reports itself
As soon as samples are dropped, their count joins the line, and the title changes when writing stalls or fails. It is the one thing worth reporting before the operator looks at the screen again.
Ready for Live Updates
The notification declares itself to the system as a Live Update — Android's counterpart to the iOS Dynamic Island, a strip inside the status bar itself. On the Android 16 build under test it does not render yet, because that part of the system is not switched on; the app is waiting for it, ready.
The colour tells you
what was just captured.
A wave crosses the background every time something is written — and now in a colour that says where the sample came from. From across the desk you can see not only that data is flowing, but what is being heard right now.
A colour per source
Green is sensors, blue networks, amber GNSS and violet Bluetooth. Sensors run at 50 ms, so green is a continuous swell with the other colours flashing through it — a blue flash is a network scan, a violet one Bluetooth.
The wave keeps off the text
It used to be drawn over the content as well, tinting the title in the header, the messages and the status row. Now it sits at the very bottom: it passes under the header but leaves the type alone.
Content runs under the bars
When the header hides on scroll, the cards continue under the status bar instead of stopping at it and leaving an empty strip above. The wave shows through under the bars too.
Start no longer overwrites
work in progress.
Start resumes the last measurement instead of quietly replacing it with a new one. Beyond that, the phone lets your pocket know when the connection drops or data stops being stored.
Start continues, it does not restart
Until now every Start opened a new measurement and the previous one became unreachable — it stayed in the phone, but only the new one could be exported. Now it continues, and a clean slate comes only from Reset, which deletes the previous measurement.
A pause does not count towards the duration
The duration is the sum of the time actually spent collecting, not the span from the first Start to the last Stop — for a run interrupted overnight that would claim fifteen hours of collection. In the export it is running_ms.
Interruptions are in the data
Every stop and every resume adds its own session record with a timestamp. The data therefore shows when collection ran and when it waited, so a pause is not mistaken for a hole in coverage.
A buzz at a hole in coverage
Losing the connection is a soft thud, regaining it two light taps, a failed write three firm knocks. The phone is in your pocket while you walk, and these are the events the screen cannot tell you about. Every buzz goes into the data as haptic, so a window can be cut around the vibration.
The counter runs live
The count is no longer sampled. At two thousand records per second it used to jump by more than five hundred; now it flows, and only the digits slow enough to read are animated. The figures have fixed slots and sit on the baseline.
A panel instead of a form
Start, Reset and Stop are solid colour fields — an unavailable switch turns translucent but keeps its colour. Export got its own plate with a label on which the size of the pending file grows, and a green wave crosses the background with every written sample.
How much ground
we actually covered.
This version adds distance walked next to the duration, in a way that does not credit metres to a phone lying on a desk. Beyond that, the capacity burst shows its progress and technology selection is driven by presets.
Distance walked, in metres
The status card shows Distance instead of a static source count. The value is stored with the session, so a finished measurement still shows it after an app restart, and in the export it is distance_m.
Metres, not GPS noise
A walker covers about 1.4 m between one-second fixes, while the uncertainty of a single fix is usually larger. Distance is therefore not measured between neighbours but by moving an anchor once it passes the threshold max(3 m, accuracy).
Location accuracy on show
The accuracy of the last fix sits under the metrics. When the position is too coarse to count towards distance, the card says so outright, so a number that will not move has an explanation.
The capacity burst shows its progress
A new record for the start of a burst puts its beginning into the data, not only its result. Meanwhile the UI runs a countdown next to the transport, and a burst interrupted by Stop is not left hanging.
Technology presets
“All” and “Clear all” became a single switch, with Default in front of it. The app recognises hand-tuned sensor values, asks before overwriting them and offers to keep them as the Custom preset.
Legible messages
A dark treatment tinted by message type, dismissible by dragging down. An error stays on screen for 15 seconds, an ordinary notice disappears after four.
Internet mapping
while moving through a building.
Continuous transfer mapping got its own card ahead of Start, a heartbeat began watching collection from the inside, and a code audit cleaned up the bindings to Android callbacks.
A card of its own for mapping
A separate card keeps continuous mapping apart from the one-off speed test. It can measure Wi‑Fi, cellular data or both transports at once over a specific Android Network.
A data estimate up front
The interface shows the upper bound before you start: at most 204 MB per 30 minutes for one transport and 407 MB for both.
A heartbeat over collection
A running check of the collectors, the writer and the write queue. The session then distinguishes an ordinary Stop, a writer failure and an interruption after the process died.
The export admits its gaps
The header carries the last stored timestamp, the trailing gap and the counts of accepted, written and dropped samples.
Audited callbacks
Registrations for GPS, GNSS, NMEA and navigation messages are visible in the export itself. Bluetooth Classic stores the states of the discovery cycle as well as the devices actually found.
Fixes from the code audit
The duration of a finished measurement is computed from stored timestamps, stopping the mapping leaves no NetworkCallback hanging, and sensors deliver data on their own thread.
Maintenance that
stops dropping samples.
No new measurement feature. A version born from a code audit, fixing the reliability of collection, writing and export, and moving the format to V3.
Dropped samples on show
When writing falls behind, the count appears in the app and goes into the header as dropped_samples. Samples used to vanish unannounced; ending a measurement no longer loses the last of them either.
Ranges hold
A setting outside the allowed range is pulled back into it, so a zero interval no longer spins a scan with no pause.
A disabled Bluetooth is recognised
With the adapter off, the sources are not marked as measured and ADAPTER_DISABLED goes into the export instead of a blank.
Collection off the main thread
The GNSS, location, Wi‑Fi RTT and cellular callbacks run aside, so raw GNSS no longer slows the controls. The microphone is released only after the read completes.
Format V3
SIGNAL_COLLECTOR_TXT_V3 adds the dropped_samples header and drops the source_timestamp_ns column, which only duplicated elapsed_realtime_ns.
Schema 2 without losses
The database moves by migration and existing measurements survive. Temporary files created for sharing are cleaned up, so the cache no longer grows by a whole measurement.
Transfer quality,
measured continuously.
Alongside the one-off speed test there is now a per-second stream of samples of real download, upload and RTT — bound to a specific network and enriched with radio context.
A sample every second
The measurement runs from Start to Stop and produces roughly one network_quality_sample per second.
What a sample holds
A 64 KiB download, an 8 KiB upload and three small HTTPS RTT probes. The output carries the real transfer times, short-term throughput, RTT min/avg/max, jitter, errors and timeouts.
Capacity burst
Every 30 seconds a network_capacity_probe is produced with a 1 MiB download and a 128 KiB upload.
Forced transport
The test can be sent over a specific Wi‑Fi or cellular Android Network, even when both are available at once.
Radio and location with the sample
Every sample carries the last Wi‑Fi or cellular radio context and the last known location, including its age.
Quality, not a record
The small samples are labelled as measurements of quality over time, not of maximum internet speed. The server layer supports the CLOUDFLARE, CUSTOM and LOCAL modes.
Controls that
stay where they are.
A small interface release. Actions no longer move with the state of the measurement, the top bar gives room to the content, and a message can be dismissed when it is in the way.
Download and Share stay put
The buttons keep their place. Without a finished measurement they are dimmed and inactive, not hidden.
A vanishing top bar
It hides when you scroll down and comes back when you scroll up.
Recommend from the bar
Prepares a new e‑mail with no recipient filled in, carrying a subject, a message and links to the app.
Dismissible messages
Status notices are a bottom message that can be closed; otherwise they disappear on their own after a longer interval.
The storage note moved down
The note about local data storage now sits at the very bottom, visually subdued.
Active scan
and a measured speed test.
This version introduces an experimental active cellular scan with an exact reason for refusal, and a full speed test bound to the transport actually chosen.
Active scan events
Unambiguous ACTIVE_NETWORK_SCAN_REQUESTED, STARTED, RESULT, COMPLETE and FAILED instead of guessing support from the phone brand.
The exact reason for refusal
A failed scan stores the numeric code, the exception type, the message, the carrier privileges state and the state of the MODIFY_PHONE_STATE permission.
Kept apart from passive cells
The result carries scan_mode=ACTIVE_NETWORK_SCAN and only the operator Android supplied; an unknown one stays UNKNOWN.
A test over the chosen transport
Manually over MOBILE, WIFI or sequentially BOTH, with the traffic genuinely bound to the requested Android Network. The options offered follow the validated networks available.
A complete test summary
speed_test_result carries download and upload in Mb/s, bytes and times, the minimum, mean, median, maximum and p95 RTT, jitter, packet loss, errors and the server — together with the last cell or Wi‑Fi context.
Collection that survives
The measurement continues in the background through a foreground service, preferences survive a restart, and from an estimated 10 MB upwards the export preselects GZIP.
Installazione
Si installa soltanto
da Google Play.
- 1
Installa da Google Play — senza invito, senza lista di tester, senza attese.
- 2
Misura fino a un’ora all’anno senza pagare nulla.
- 3
Sblocca la misurazione illimitata dall’interno dell’app quando l’ora non basta più.
Google Play è l’unico canale di distribuzione: firma la catena degli aggiornamenti e da nessuna parte viene offerto un APK diretto. L’app in sé non ha bisogno di alcun nostro account né di alcun nostro server per funzionare.
Prova, prezzo e assistenza
Un’ora all’anno
per decidere.
Uno strumento da campo non si giudica dalle schermate, così Signal Collector consegna a ogni telefono un’ora di tempo di misurazione all’anno — abbastanza per percorrere un tragitto, guardare l’anello riempirsi e aprire l’esportazione. Si conta il tempo di misurazione, non il numero di sessioni, quindi si può spendere in più posti e in più giorni. Quando finisce, lo sblocco è un unico acquisto in-app al prezzo di Google Play per il tuo paese: nessun abbonamento, nessuna data di rinnovo, e vale su ogni telefono collegato allo stesso account.
I riscontri passano dalla recensione su Google Play; ogni nuova recensione viene raccolta entro un giorno, trasformata in una segnalazione e risposta, e le correzioni viaggiano con l’aggiornamento successivo. L’app a pagamento non porta pubblicità, né analytics, né SDK di terzi dentro la misurazione — è il prezzo a pagare lo sviluppo al posto loro.
Cosa raccoglie davvero l’app
Dai sensori fisici
alle reti intorno a te.
Ogni sorgente si può accendere o spegnere singolarmente prima di una misurazione, e per alcune tecnologie si imposta anche l’intervallo.
Rete mobile
Cella servente e celle vicine, parametri LTE/NR/3G/2G, cambi di registrazione e la scansione attiva sperimentale.
GNSS e posizione
GPS a 1 Hz, satelliti, misure GNSS grezze, orologio, AGC, messaggi di navigazione, NMEA e informazioni sull’antenna.
Wi‑Fi e RTT
La connessione attuale, gli access point vicini, il Wi‑Fi 7 MLO, le capacità e le distanze RTT/FTM verso gli access point supportati.
Bluetooth
Rilevamento classico e payload di advertising BLE, compresi i dati di produttore e servizio.
Sensori e rumore
Movimento, campo magnetico, pressione, luce, prossimità, vettore di rotazione e un livello dBFS indicativo senza alcun audio salvato.
Rete e trasferimento
Campioni al secondo di download, upload, RTT, jitter e timeout reali, burst di capacità da 30 secondi e aggancio simultaneo a una specifica rete Wi‑Fi e a una rete mobile.
SIM ed eSIM
Slot, operatore, MCC/MNC, roaming e quale scheda porta i dati — le celle da sole nominano il trasmettitore, non chi stava guardando. Non vengono registrati né ICCID né EID: sono identificatori permanenti dell’abbonamento che sopravvivono perfino al cambio di telefono.
Sensori esterni
Un sensore che non sta
dentro il telefono.
Il telefono misura ciò a cui arriva. Una sonda sul muro, uno strumento in fondo a un cavo, un ricevitore sul tetto: quelli devono entrare per un'altra strada. Le strade sono quattro e la prima funziona già.
Sensori che trasmettono · già in funzione
BTHome, Ruuvi, ATC e pvvx, telemetria Eddystone. Niente da accoppiare e niente a cui collegarsi: il sensore grida la sua misura nella stanza e la scansione già in corso la sente. Temperatura, umidità, pressione, CO₂, polveri, tensione — con un nome, in unità SI, nello stesso file di tutto il resto.
Profili Bluetooth LE · previsto
Environmental Sensing descrive da sé le proprie misure, così anche uno strumento di cui nessuno ha mai sentito parlare si legge insieme alla sua unità. Accanto ci sono i profili standard — batteria, termometro, posizione — e il servizio Nordic UART, la lingua di un apparecchio costruito in casa.
Una linea seriale su cavo · previsto
CDC-ACM, FTDI, CP210x, PL2303, CH340. Cinque famiglie di chip coprono quasi tutto ciò che si infila nell'USB e non è un disco: schede Arduino ed ESP32, ricevitori u-blox, analizzatori di spettro, strumenti che rispondono in SCPI.
Un dispositivo sulla rete locale · previsto
Trovato via mDNS, letto via HTTP o come semplice flusso TCP. La richiesta è legata alla rete Wi-Fi, così non esce dai dati mobili e non si perde per strada verso un apparecchio che sta una stanza più in là.
Niente viene indovinato. Una misura che il sensore stesso ha segnato come non valida viene omessa invece di essere scritta come numero; un payload cifrato viene registrato come cifrato e non decifrato in finzione; e un formato che l'app non conosce resta nel file come byte grezzi. Le chiavi sono elencate nel dizionario dei dati.
Comandi fuori dall’app
Un tasto che non richiede
di aprire prima l’app.
Misurare sul campo significa una mano sul telefono e l’altra su qualcos’altro. Ogni comando che conta ha perciò un posto anche fuori dall’app, e ciascuno manda esattamente lo stesso ordine dello schermo.
Quadro di misura
Un widget che avvia l’insieme di sorgenti e intervalli salvato al suo interno. Mentre misura lo dichiara, porta i numeri della misurazione e un secondo tocco chiede conferma prima di fermarla. Il tasto conserva una copia propria di ciò che avvia: cambiare in seguito un preset nell’app non modifica quindi in silenzio ciò che misura la schermata iniziale.
Segna punto
Fino a quattro etichette tue una accanto all’altra: porta, angolo, finestra sono un tocco ciascuna e finiscono subito nel punto. Se non c’è nulla in corso, il tasto avvia la misurazione e segna il punto in una sola mossa.
Riquadro sorgente
Una sorgente come un unico numero grande: access point a portata, satelliti nel fix, intensità sonora. Un tocco quando non c’è nulla in corso avvia una misurazione con quella sola sorgente.
Elenco delle sorgenti
Fino a sei sorgenti, una riga ciascuna, nell’ordine in cui le hai scelte — un elenco da leggere a colpo d’occhio, non da cercare.
Riquadro nelle impostazioni rapide
Avvio e arresto da qualsiasi app e sopra la schermata di blocco. Misura con ciò con cui l’app ha misurato l’ultima volta. Su un blocco protetto chiede prima di sbloccare il telefono: ciò che parte è la posizione con il microfono.
Scorciatoie sotto l’icona
Una pressione lunga sull’icona offre Avvia finché non c’è nulla in corso, e Ferma con Segna punto appena qualcosa parte. Il punto è segnato senza etichetta: le etichette stanno sul tasto del widget, dove c’è spazio per loro.
La notifica
Durante la misurazione porta la durata, il numero di record e la distanza percorsa, e sotto Segna punto e Ferma. Avvia può restare nella tendina per tutto il tempo in cui non c’è nulla in corso, così misurare a tratti non significa ritrovare l’app ogni volta.
I tasti li ridisegna la misurazione stessa, una volta ogni cinque secondi: un widget non può essere più fresco dell’app che lo alimenta. Per questo ogni tasto porta l’ora a cui i suoi numeri sono stati letti; l’eccezione è il cronometro, che scorre da solo. Si configurano tutti in un unico posto, Tasti sulla schermata iniziale nel menu delle impostazioni, e li descrive la guida.
Verifica sul campo, 10 agosto 2026
Dati da un telefono
vero.
Tutto quello che segue è stato misurato su un Google Pixel 10a con Android 16. Nella versione 0.7.2 una sola misurazione in tre tratti ha raccolto 87.597 record: la durata è cresciuta da 2:49 a 7:21 e poi 8:12, il numero della misurazione non è mai cambiato, e più di venti minuti di pause fra i tratti non hanno contato nella durata. I valori di distanza vengono da una sessione di nove minuti della versione 0.7.1 sullo stesso telefono — il filtro di distanza da allora non è cambiato.
I primi 274 fix avevano una precisione fra 9 e 114 m. Sommare le distanze fra fix vicini darebbe 429 m, o 28 m una volta filtrati i fix grossolani; spostare l’ancora oltre la soglia ha dato zero. Il telefono di prova non aveva SIM, quindi il ramo mobile della mappatura ha correttamente segnalato la rete come non disponibile.
Versioni e materiali
Installazione, modifiche
e codice sorgente.
Il repository resta privato. I collaboratori autenticati ci trovano il codice sorgente, le release taggate e i checksum degli APK.
Privacy
I dati misurati non lasciano mai il telefono.
L’app funziona offline e non contiene alcun SDK di analytics, pubblicità, attribuzione o segnalazione di crash — e non ne verrà aggiunto nessuno. Ogni libreria di cui l’app è fatta è nominata nell’informativa sulla privacy, ciascuna fissata a una versione esatta, così che dentro non cambi nulla senza un rilascio che lo dica. La mappatura continua opzionale della qualità di trasferimento usa gli endpoint pubblici di Cloudflare Speedtest per piccoli trasferimenti HTTPS di prova e burst periodici; non è una misura della velocità massima di internet. Il modulo è disattivato per impostazione predefinita. Se acquisti lo sblocco, dal telefono parte una segnalazione d’acquisto che non porta alcun dato misurato; è descritta nell’ informativa sulla privacy. Un’esportazione può contenere dati di posizione sensibili e identificatori di reti vicine.
Come funziona
Da un sensore
a una riga in un file.
Ogni sorgente va al proprio ritmo. Un campione viene marcato con l’ora e l’ultima posizione nota, passa per una coda non bloccante e viene salvato a lotti nel database locale. Le chiavi sottolineate nello schema portano al dizionario dei dati.
Impostazioni della raccolta
Gli stessi parametri che l’app offre per ogni sorgente prima dell’avvio di una misurazione. Gli intervalli e la stima dei dati corrispondono all’implementazione; una modifica compare subito nello schema qui sopra.
Intervallo 10–1000 ms
Intervallo 100–60000 ms
Intervallo 5–300 s
Intervallo 5–60 s
Intervallo 5–300 s
Mappatura di internetRete per la misurazione continua
Con entrambe selezionate lavorano insieme due handle Network di Android separati.
Intervallo 500–5000 ms
Intervallo 1–1024 KiB
Intervallo 1–256 KiB
Intervallo 10–300 s
Intervallo 64–10240 KiB
Intervallo 8–2048 KiB
La stima è un limite superiore: su un collegamento lento un campione richiede più tempo, quindi ne entrano meno nello stesso intervallo e si trasferiscono meno dati. Questa non è una misura della velocità massima — perché.