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Android · offline dataindsamling · version 1.5.2
En telefon, der fungerer
som et rigtigt instrument.
Signal Collector optager løbende de sensor-, radio- og netværksdata, telefonen kan nå, direkte ned i telefonen — ingen skylagring, ingen målte data der forlader enheden.
Rigtige optagelser · Pixel 10a
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En måling i gang. Ringen viser satellitter, netværk og sensorer, efterhånden som de kommer ind.
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Valget af, hvad der skal måles. Hver kilde er en række, der fortæller, hvad den optager.
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Start, nulstil og stop, med varigheden, afstanden og antallet af poster ovenover.
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Bunden af panelet: hvad hver kilde laver, og filen, der forlader telefonen.
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Indstillinger: levering til din egen server, enheder og hvad der sker efter stop.
Intern test
Den næste version, før butikken har den.
Hver build lander i den interne test, før den går i produktion. Meld dig til med den Google-konto, telefonen er logget ind med, så kommer opdateringen som enhver anden.
MVP-omfang
Én kørsel.
Hele sammenhængen.
- 01GPS, GNSS og telefonens sensorer
- 02Mobilnet: LTE / 5G / 3G / 2G
- 03Wi‑Fi, Bluetooth og netværkskontekst
- 04Løbende internetkortlægning over Wi‑Fi og mobilnet
Hvad den bruges til
Hvert tilfælde ender
i en fil.
Et måleinstrument sælges ikke på sin liste over kilder, men på det spørgsmål, det besvarer. Seks af de tolv situationer, appen er bygget til — hver af dem en tur, og en fil til sidst.
Det døde hjørne i mødelokalet
Gå etagen igennem med telefonen i lommen, og indtal en note ved hver dør. Ud kommer gennemløbet sekund for sekund, det AP telefonen reelt var på, og et lokale i stedet for en diskussion mellem to afdelinger.
En drive test uden varevognen
Begge SIM scanner, GPS hvert sekund, telefonen låst på instrumentbrættet. Hvert skift af teknologi, Cell ID eller PCI havner som en hændelse, så handovers kommer ud stedfæstet på meteren.
En opmåling, hvor GPS ikke giver noget
På et lager er himlen et tag. Markér hver reolgang med et billede fra appens egen søger, og saml AP’er, MLO-links og RTT-afstande — et dækningskort, før det første nye AP bliver købt.
Sensorer, der melder sig selv
Snesevis af BLE-termometre rundt om i en bygning, ingen af dem parret. Gå forbi, og deres temperatur, luftfugtighed og batterispænding kommer ind navngivne og i SI-enheder, ved siden af de bytes, de kom fra.
Bevis til udlejeren
Ti minutters gang giver en fil med tidsstempel, position, signalstyrke og billeder af lokalerne. »Signalet er fint overalt« bliver til en påstand, der kan efterprøves.
En kunde, der ikke vil have en sky
Mål som sædvanlig, og lever til din egen S3, WebDAV eller SFTP — eller udlever en fil. Billeder og talenoter rører aldrig telefonens galleri, så NDA’en stadig kan skrives under.
Arbejde, du kan
følge med i.
Version 1.5.1 leverer alle tolv sprog i hver installation, lader dig se en lang eksport eller Nulstil arbejde og tilføjer en løs notesbog til punkter, billeder og tests taget uden en måling i gang.
Sprog, der rent faktisk er der
Google Play leverede før kun de sprog, telefonen havde ved installationen, så sprogvalget pr. app tilbød tjekkisk og de øvrige uden tekster bag sig. Alle tolv oversættelser følger nu med i hver installation.
En komet på tasten
Hent, Del og Nulstil tager fra sekunder til minutter på en stor måling. En komet løber nu rundt langs tastens kant, med halen voksende efter den færdige del, og en levende linje under den fortæller hvor meget der er gjort, hvor længe den har kørt, og cirka hvor længe der er tilbage. Den ledige plads vises, før skrivningen begynder — gul når det kniber, rød når eksporten ikke kan være der.
En løs notesbog
Målepunkter, billeder, talenoter, engangstesten af internettet og en cyklus med Wi-Fi-gennemløb behøver ikke længere Start. Uden en måling i gang havner de i en særskilt optegnelse uden indsamlere, uden wake lock og uden at tælle fra den gratis time — med sit eget kort, sin egen Del-fil og sin egen Ryd.
Del fra ikonet, systemets betjeningselementer
Tryk og hold på appens ikon, når en måling er stoppet, og Del står der ved siden af Start; den åbner appen og starter eksporten med det samme. Kontakter, tekstfelter, valg og beskeder er nu almindelige Android-elementer — tasterne og selve instrumentet er, som de var.
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.
Installation
Installeres udelukkende gennem
Google Play.
Hent den på Google Play
- 1
Installér fra Google Play — ingen invitation, ingen testerliste, ingen ventetid.
- 2
Mål op til en time om året uden at betale noget.
- 3
Lås op for ubegrænset måling inde i appen, når timen ikke længere slår til.
Google Play er den eneste distributionskanal: den signerer opdateringskæden, og der tilbydes ingen direkte APK nogen steder. Selve appen kræver hverken en konto hos os eller en server hos os for at køre.
Prøvetid, pris og support
En time om året
til at bestemme dig.
Et feltinstrument kan ikke bedømmes ud fra skærmbilleder, så Signal Collector giver hver telefon en times måletid om året — nok til at gå en rute, se ringen fyldes og åbne eksporten. Timen tælles i måletid, ikke i kørsler, så den kan bruges flere steder på flere dage. Når den er brugt op, er oplåsningen et engangskøb i appen til Google Play-prisen for dit land: intet abonnement, ingen fornyelsesdato, og den følger med til alle telefoner, der er logget ind på den samme konto.
1 timegratis måletid, fornyet hvert år
Ét købubegrænset fra da af, på alle dine telefoner
24 timerfra en anmeldelse til en registreret sag
Feedback går gennem anmeldelserne på Google Play; hver ny anmeldelse bliver taget op inden for et døgn, gjort til en sag og besvaret, og rettelserne følger med næste opdatering. Den betalte app har hverken reklamer, analyse eller tredjeparts-SDK’er inde i målingen — det er prisen, der betaler for udviklingen i stedet.
Hvad appen rent faktisk indsamler
Fra fysiske sensorer
til netværkene omkring dig.
Hver kilde kan slås til eller fra enkeltvis før en måling, og for udvalgte teknologier kan intervallet også indstilles.
Mobilnet
Den betjenende celle og nabocellerne, LTE/NR/3G/2G-parametre, ændringer i registreringen og den eksperimentelle aktive scanning.
GNSS og position
GPS ved 1 Hz, satellitter, rå GNSS-målinger, ur, AGC, navigationsbeskeder, NMEA og antenneoplysninger.
Wi‑Fi og RTT
Den aktuelle forbindelse, AP’er i nærheden, Wi‑Fi 7 MLO, egenskaber og RTT/FTM-afstande til understøttede adgangspunkter.
Bluetooth
Klassisk enhedssøgning og indholdet af BLE-udsendelserne, inklusive producent- og servicedata.
Sensorer og støj
Bevægelse, magnetfelt, tryk, lys, nærhed, rotationsvektor og et vejledende dBFS-niveau, uden at der gemmes lyd.
Netværk og overførsel
Prøver hvert sekund af reel download, upload, RTT, jitter og tidsudløb, kapacitetsburst på 30 sekunder og binding til et bestemt Wi‑Fi- og mobilnet på samme tid.
SIM og eSIM
Plads, operatør, MCC/MNC, roaming og hvilket kort der bærer dataene — celler alene navngiver senderen, ikke hvem der lyttede til den. Hverken ICCID eller EID optages: det er permanente abonnementsnumre, der overlever selv et telefonskift.
Eksterne sensorer
En sensor, der ikke sidder
inde i telefonen.
Telefonen måler det, den kan nå. En føler på væggen, en måler for enden af et kabel, en modtager på taget — de skal ind ad en anden vej. Der er fire veje ind, og den første virker allerede.
Sensorer, der udsender · virker nu
BTHome, Ruuvi, ATC og pvvx, Eddystone-telemetri. Intet at parre og intet at tilslutte: sensoren råber sin aflæsning ud i lokalet, og den scanning, der allerede kører, hører den. Temperatur, luftfugtighed, tryk, CO₂, partikler, spænding — navngivet, i SI-enheder, i den samme fil som alt andet.
Bluetooth LE-profiler · planlagt
Environmental Sensing beskriver sine egne målinger, så selv en måler, ingen har hørt om, kan aflæses sammen med sin enhed. Ved siden af den standardprofilerne — batteri, termometer, position — og Nordic UART-tjenesten, som er den måde, en hjemmebygget føler taler på.
En seriel linje på et kabel · planlagt
CDC-ACM, FTDI, CP210x, PL2303, CH340. Fem familier af chips dækker næsten alt, der sættes i USB og ikke er en disk: Arduino- og ESP32-kort, u-blox-modtagere, spektrumanalysatorer, målere der svarer i SCPI.
En enhed på det lokale netværk · planlagt
Fundet over mDNS, læst over HTTP eller som en almindelig TCP-strøm. Forespørgslen er bundet til Wi-Fi-netværket, så den ikke går ud gennem mobildata og farer vild på vej til en maskine i lokalet ved siden af.
Intet gættes. En aflæsning, som sensoren selv har markeret som ugyldig, udelades i stedet for at blive skrevet som et tal, et krypteret indhold optages som krypteret frem for at blive tydet til fiktion, og et format, appen ikke kender, bliver i filen som rå bytes. Nøglerne er opregnet i dataordbogen.
Betjening uden for appen
En tast, der ikke kræver
at appen åbnes først.
Måling i felten betyder én hånd på telefonen og den anden på noget andet. Derfor har hvert betjeningselement, der betyder noget, en plads uden for appen, og de sender alle nøjagtig den samme instruktion som skærmen.
Målepanel
En widget, der starter det sæt kilder og de intervaller, der er gemt i den. Mens den kører, siger den det, bærer målingens tal, og et tryk mere spørger, før den stopper. Tasten beholder sin egen kopi af det, den starter, så et skift af forvalg i appen senere ikke i stilhed ændrer, hvad startskærmen måler.
Markér punkt
Op til fire af dine egne mærker ved siden af hinanden — dør, hjørne, vindue er ét tryk hver og skrives til punktet med det samme. Når intet kører, starter tasten målingen og markerer punktet i én bevægelse.
Kildefelt
Én kilde som ét stort tal: adgangspunkter i rækkevidde, satellitter i fix, lydstyrke. Et tryk, mens intet kører, starter en måling med den kilde alene.
Kildeaflæsning
Op til seks kilder, én linje hver, i den rækkefølge du valgte dem — en liste, der læses med ét blik i stedet for at skulle gennemsøges.
Felt i kvikindstillingerne
Start og Stop fra enhver app og over låseskærmen. Den måler med det, appen sidst målte med. Over en sikret låseskærm beder den om, at telefonen låses op først: det, der starter, er position med en mikrofon.
Genveje under ikonet
Et langt tryk på appens ikon tilbyder Start, mens intet kører, og Stop sammen med Markér punkt, når noget gør. Punktet markeres uden mærke — mærkerne sidder på widget-tasten, hvor der er plads til dem.
Notifikationen
Under målingen bærer den varigheden, antallet af poster og den tilbagelagte afstand, med Markér punkt og Stop nedenunder. Start kan blive i notifikationspanelet hele den tid, intet kører, så en måling i etaper ikke betyder, at appen skal findes frem hver gang.
Tasterne tegnes op af selve målingen, én gang hvert femte sekund — en widget kan ikke være friskere end den app, der føder den. Derfor bærer hver tast tidspunktet, dens tal blev aflæst på; stopuret er undtagelsen, det tikker af sig selv. De sættes alle op ét sted, Taster på startskærmen i indstillingsmenuen, og de er beskrevet i hjælpen.
Felttjek, 10. august 2026
Data fra en rigtig
telefon.
Alt herunder er målt på en Google Pixel 10a med Android 16. På version 0.7.2 samlede én måling i tre etaper 87.597 poster: varigheden voksede fra 2:49 over 7:21 til 8:12, målingens nummer ændrede sig aldrig, og mere end tyve minutters pauser mellem etaperne talte ikke med i varigheden. Afstandstallene kommer fra en ni minutter lang kørsel af version 0.7.1 på den samme telefon — afstandsfilteret er ikke ændret siden.
429 mGPS-støj smidt væk af afstandsfilteret
0 mgået af en telefon, der aldrig flyttede sig
9/9burst med en start parret til et resultat
De første 274 fix havde en nøjagtighed mellem 9 og 114 m. Lægger man afstandene mellem nabofix sammen, giver det 429 m, eller 28 m når de grove fix er filtreret fra; at flytte ankeret forbi tærsklen gav nul. Testtelefonen havde intet SIM, så mobilgrenen af kortlægningen meldte korrekt netværket som utilgængeligt.
Versioner og materiale
Installation, ændringer
og kildekode.
Arkivet forbliver privat. Samarbejdspartnere, der er logget ind, finder kildekoden, taggede udgivelser og APK-tjeksummer i det.
Udgivelsesnoter1.5.2 · TXT
Tidligere version1.5.1 · TXT
Tidligere version1.3.0 · TXT
Tidligere version1.0.0 · TXT
Tidligere version0.10.0 · TXT
Tidligere version0.9.2 · TXT
Tidligere version0.9.1 · TXT
Tidligere version0.9.0 · TXT
Tidligere version0.7.3 · TXT
Tidligere version0.7.0 · TXT
Tidligere version0.6.1 · TXT
APK-artefakterGitHub Releases ↗
DataordbogEksportformat · HTML
KildekodePrivat GitHub ↗
Privatliv
Målte data forlader aldrig telefonen.
Appen virker offline og indeholder hverken analyse-, reklame-, attributions- eller nedbrudsrapporterings-SDK’er — og der kommer ingen til. Hvert bibliotek, appen er bygget af, er nævnt i privatlivspolitikken, hver enkelt låst til en bestemt version, så intet indeni ændrer sig uden en udgivelse, der siger det. Den valgfrie løbende kortlægning af overførselskvaliteten bruger de offentlige Cloudflare Speedtest-endepunkter til små HTTPS-testoverførsler og periodiske burst; det er ikke en måling af den maksimale internethastighed. Modulet er slået fra som standard. Køber du oplåsningen, forlader én købsrapport telefonen, og den bærer ingen målte data; den er beskrevet i privatlivspolitikken. En eksport kan indeholde følsomme positionsdata og identifikatorer for netværk i nærheden.
Sådan virker det
Fra en sensor
til en række i en fil.
Hver kilde kører i sit eget tempo. En prøve stemples med et tidspunkt og den senest kendte position, passerer gennem en ikke-blokerende kø og gemmes i den lokale database i portioner. Understregede nøgler i diagrammet fører til dataordbogen.
Indstillinger for indsamlingen
De samme parametre, appen tilbyder for hver kilde, før en måling starter. Intervallerne og dataskønnet svarer til implementeringen; en ændring dukker op i diagrammet ovenfor med det samme.
ms
Interval 10–1000 ms
ms
Interval 100–60000 ms
s
Interval 5–300 s
s
Interval 5–60 s
s
Interval 5–300 s
InternetkortlægningNetværk til løbende måling
Med begge valgt kører to separate Android-Network-handles samtidig.
ms
Interval 500–5000 ms
KiB
Interval 1–1024 KiB
KiB
Interval 1–256 KiB
s
Interval 10–300 s
KiB
Interval 64–10240 KiB
KiB
Interval 8–2048 KiB
407 MBøvre skøn over dataforbruget pr. 30 minutters kortlægning
8 400prøver i minuttet fra syv sensorer
120prøver i minuttet fra internetkortlægningen
20Wi-Fi- og mobilscanninger pr. 10 minutter
Skønnet er en øvre grænse: på en langsom forbindelse tager en prøve længere, så der er plads til færre af dem i den samme tid, og der overføres mindre data. Dette er ikke en måling af den maksimale hastighed — hvorfor.