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Android · オフラインのデータ収集 · バージョン 1.5.2
電話機が、
そのまま測定器になる。
Signal Collector は端末が取得できるセンサー・無線・ネットワークのデータを連続して記録します。保存先は端末そのもので、クラウドも使わず、測定データが端末から出ることもありません。
実機の画面 · Pixel 10a
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実行中の測定。リングは届いた衛星・ネットワーク・センサーを示します。
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何を測るかを選びます。どのソースも、何を記録するかを書いた1行です。
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開始・リセット・停止。その上に経過時間、距離、レコード数が並びます。
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パネルの下部。各ソースの動作と、端末から出ていくファイルです。
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設定: 自分のサーバーへの送信、単位、停止後の動作。
内部テスト
ストアに並ぶ前の、次のバージョン。
すべてのビルドは製品版に出る前に内部テストへ入ります。端末でサインインしている Google アカウントで参加すれば、更新は通常どおり届きます。
MVP の範囲
一度の測定で、
文脈のすべてを。
- 01GPS、GNSS、端末のセンサー
- 02モバイルネットワーク: LTE / 5G / 3G / 2G
- 03Wi‑Fi、Bluetooth、ネットワークの状況
- 04Wi‑Fi とモバイルでのインターネットの連続マッピング
用途
どの現場も、
最後は1つのファイルに。
測定器はソースの一覧で選ばれるのではなく、答えられる問いで選ばれます。このアプリが想定する12の場面のうち6つを挙げます。どれも歩くことから始まり、最後にファイルが残ります。
会議室のデッドスポット
端末をポケットに入れてフロアを歩き、扉ごとに音声メモを残します。出てくるのは秒ごとのスループット、端末が実際につながっていた AP、そして 言い争いの代わりになる一つの部屋 という答えです。二つの部署の話はそこで終わります。
車両を出さないドライブテスト
両方の SIM をスキャンし、GPS は1秒間隔、端末はダッシュボードに固定。技術方式、Cell ID、PCI の変化はすべてイベントとして記録されるので、 ハンドオーバーがメートル単位で位置付きになります.
GPS が役に立たない調査
倉庫では空の代わりに屋根があります。アプリのファインダーで撮った写真を通路ごとに付け、AP、MLO リンク、RTT の距離を集めれば、 AP を1台買う前にカバレッジ図ができます.
自分から知らせてくるセンサー
建物のあちこちに BLE 温度計が数十台、どれもペアリングなし。そばを通るだけで、温度・湿度・電池電圧が 名前と SI 単位の付いた値として届きます。元になったバイト列も並べて残ります。
貸主に示す証拠
10 分歩けば、時刻・位置・信号強度・部屋の写真が入ったファイルが手に入ります。「どこでも電波は問題ない」が、 検証できる主張に変わります.
クラウドを認めない顧客
いつもどおり測定し、自分の S3、WebDAV、SFTP に送るか、ファイルを手渡します。写真も音声メモも端末のギャラリーには入らないので、 NDA に署名できる状態が保たれます.
仕事の進み具合が、
目に見える。
バージョン 1.5.1 は 12 言語すべてをどのインストールにも同梱し、長いエクスポートやリセットの進み具合を見えるようにし、測定を動かさずに取った測点・写真・テストのための自由ノートを追加しました。
本当に入っている言語
これまで Google Play はインストール時に端末が持っていた言語だけを配信していたため、アプリごとの言語選択にはチェコ語などが並ぶのに 中身の文字列がありませんでした。12 の翻訳すべてが、どのインストールにも同梱されるようになりました。
キーの上を走る彗星
大きな測定では、ダウンロード・共有・リセットに数秒から数分かかります。キーの縁を彗星が回り、終わった分だけ尾が伸びます。その下の行には どこまで進み、どれだけ経過し、あとどれくらいかかるかが出ます。書き込みの前には空き容量が表示され、少なければ橙、エクスポートが収まらなければ赤になります。
自由ノート
測点、写真、音声メモ、単発のインターネットテスト、Wi-Fi スループットの1サイクルは、もう開始を必要としません。測定が動いていないときは別のレコードに入り、 コレクターも wake lock も使わず、無料の1時間も減りません 。専用のカード、専用の共有ファイル、専用の消去を持ちます。
アイコンからの共有、標準の操作部品
測定を停止したあとにアプリのアイコンを長押しすると、 開始の隣に共有があります。タップするとアプリが開き、そのままエクスポートが始まります。スイッチ、テキスト入力、選択、メッセージは標準の Android 部品になりました。キーと計器そのものは以前のままです。
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.
インストール
配布は
Google Play だけ。
Google Play で入手
- 1
Google Play からインストールできます。招待もテスター登録も待ち時間もありません。
- 2
年に1時間までは、支払いなしで測定できます。
- 3
その1時間で足りなくなったら、アプリの中から無制限の測定を解除できます。
配布経路は Google Play だけです。更新の署名の連なりを Play が担い、APK を直接配ることはどこでもしていません。アプリ自体の動作に、こちらのアカウントもこちらのサーバーも必要ありません。
試用、価格、サポート
年に1時間、
見極めるために。
現場の測定器は画面写真では判断できません。そこで Signal Collector は、どの端末にも年に1時間の測定時間を渡します。1本の経路を歩き、リングが埋まるのを見て、エクスポートを開くには十分な長さです。数えるのは測定時間であって実行回数ではないので、何日かに分けて別々の場所で使えます。使い切ったあとの解除は、お住まいの国の Google Play 価格での一度きりのアプリ内購入です。定期購入も更新日もなく、同じアカウントでサインインしたどの端末にも引き継がれます。
1 時間の測定時間が無料。毎年戻ります
一度の購入以後は無制限。あなたのどの端末でも
24 時間レビューから課題の切り分けまで
フィードバックは Google Play のレビューを通じて届きます。新しいレビューは1日以内に拾って課題にし、返信します。修正は次の更新に乗ります。有料のアプリには広告も解析も入らず、測定の中に第三者の SDK もありません。開発を支えているのは価格そのものです。
アプリが実際に集めるもの
物理センサーから、
周囲のネットワークまで。
どのソースも測定の前に個別にオンとオフを切り替えられます。一部の技術では間隔も設定できます。
モバイルネットワーク
在圏セルと隣接セル、LTE/NR/3G/2G のパラメーター、登録の変化、そして実験的なアクティブスキャン。
GNSS と位置
1 Hz の GPS、衛星、GNSS の生の測定値、クロック、AGC、航法メッセージ、NMEA、アンテナ情報。
Wi‑Fi と RTT
現在の接続、周囲の AP、Wi‑Fi 7 の MLO、対応機能、対応アクセスポイントまでの RTT/FTM 測距。
Bluetooth
クラシックの探索と、製造者データやサービスデータを含む BLE のアドバタイズ内容。
センサーと騒音
動き、磁界、気圧、照度、近接、回転ベクトル、そして音声を保存しない dBFS の目安レベル。
ネットワークと転送
実際のダウンロード・アップロード・RTT・ジッター・タイムアウトの毎秒サンプル、30 秒の容量バースト、そして特定の Wi‑Fi とモバイルネットワークへの同時バインド。
SIM と eSIM
スロット、事業者、MCC/MNC、ローミング、どのカードがデータを担うか。セルだけでは送信側は分かっても、見ていた側は分かりません。ICCID も EID も記録しません。端末を替えても残る、恒久的な契約番号だからです。
外部センサー
端末の中には
ないセンサー。
端末が測れるのは端末に届くものだけです。壁のプローブ、ケーブルの先の計器、屋根の受信機は別の道から入る必要があります。入口は4つあり、最初の1つはすでに動いています。
自ら発信するセンサー · 動作中
BTHome、Ruuvi、ATC と pvvx、Eddystone のテレメトリー。ペアリングも接続も不要です。センサーが読み値を空間に呼びかけ、すでに動いているスキャンがそれを聞きます。温度、湿度、気圧、CO₂、粒子状物質、電圧が、名前と SI 単位の付いた値として、ほかのすべてと同じファイルに入ります。
Bluetooth LE のプロファイル · 予定
Environmental Sensing は自身の測定内容を記述するため、誰も知らない計器でも単位と一緒に読み取れます。その隣には標準のプロファイル、つまり電池、体温計、位置、そして自作プローブが話す Nordic UART サービスが並びます。
ケーブルのシリアル回線 · 予定
CDC-ACM、FTDI、CP210x、PL2303、CH340。この5系統のチップで、USB につながるディスク以外のほとんどを覆えます。Arduino や ESP32 のボード、u-blox の受信機、スペクトラムアナライザー、SCPI で応答する計器などです。
ローカルネットワーク上の機器 · 予定
mDNS で見つけ、HTTP か素の TCP ストリームで読みます。要求は Wi-Fi ネットワークに束ねられるので、隣の部屋の機器に向かうつもりがモバイルデータから出て行方不明になることはありません。
推測はしません。センサー自身が無効と示した値は数値として書かずに省き、暗号化されたペイロードは作り話に復号せず暗号化のまま記録し、アプリが知らない形式は生のバイト列としてファイルに残します。キーの一覧は データ辞書.
アプリの外の操作
アプリを開かずに
押せるキー。
現場での測定は、片手が端末、もう一方の手が別のものにふさがります。だから重要な操作にはアプリの外にも居場所があり、どれも画面と まったく同じ指示を送ります。
測定パネル
保存されたソースの組み合わせと間隔で測定を始めるウィジェットです。動いている間はそう表示し、測定の数値を載せ、停止するときは2回目のタップの前に確認します。キーは何を開始するかの複製を自分で持つので、あとからアプリでプリセットを変えても、ホーム画面が測る内容が黙って変わることはありません。
測点を記録
自分のラベルを4つまで横に並べられます。出入口、角、窓はそれぞれ1タップで、そのまま測点に書き込まれます。何も動いていないときは、キーが測定の開始と測点の記録をまとめて行います。
ソースタイル
1つのソースを大きな数字1つで表します。圏内のアクセスポイント数、測位に使っている衛星数、騒音の大きさなど。何も動いていないときにタップすると、そのソースだけで測定を始めます。
ソース表示
ソースを6つまで、1行ずつ、選んだ順のまま並べます。探すのではなく、一目で読むための一覧です。
クイック設定のタイル
どのアプリからでも、ロック画面の上でも開始と停止ができます。測定内容はアプリが最後に測ったものと同じです。保護されたロック画面の上では先に端末の解除を求めます。始まるのは位置情報とマイクだからです。
アイコン下のショートカット
アプリのアイコンを長押しすると、何も動いていないときは開始が、動いているときは停止と測点の記録が出ます。測点にラベルは付きません。ラベルは場所に余裕のあるウィジェットのキーの役目です。
通知
測定中は経過時間、レコード数、歩いた距離を載せ、その下に測点の記録と停止が並びます。何も動いていない間はシェードに開始を出したままにできるので、区切って測るときも毎回アプリを探さずに済みます。
キーは測定自身が5秒に1度描き直します。ウィジェットは、それを養うアプリより新しくはなれません。そのため各キーには数値を読んだ時刻が付きます。例外はストップウォッチで、これは自分で進みます。設定は1か所、設定メニューの ホーム画面のキー にまとまっていて、詳しい説明は ヘルプ.
実地確認 2026年8月10日
実機で取った
データ。
以下はすべて Android 16 の Google Pixel 10a で測りました。バージョン 0.7.2 で、3区間に分けた1回の測定が 87,597 件のレコードを集めました。経過時間は 2:49、7:21、8:12 と伸び、測定番号は変わらず、区間の間の 20 分以上の休止は経過時間に数えられませんでした。距離の数値は同じ端末でのバージョン 0.7.1 の9分間の走行によるもので、距離フィルターはそれ以降変わっていません。
429 m距離フィルターが捨てた GPS のノイズ
0 m動かなかった端末が「歩いた」距離
9/9開始と結果が対になったバースト
最初の 274 回の測位は精度 9〜114 m でした。隣り合う測位の距離を足すと 429 m、粗い測位を除くと 28 m になります。基準点をしきい値の先へ動かした結果はゼロでした。テスト端末に SIM はなかったため、マッピングのモバイル側はネットワークを利用不可と正しく報告しました。
バージョンと資料
インストールと変更点、
そしてソースコード。
リポジトリは非公開のままです。権限のある共同作業者は、その中にソースコード、タグ付きのリリース、APK のチェックサムを見つけられます。
プライバシー
測定データが端末から出ることはありません。
アプリはオフラインで動作し、解析・広告・アトリビューション・クラッシュ報告の SDK をいっさい含みません。今後も追加しません。アプリを構成するライブラリはすべて プライバシーポリシーに列挙されており、それぞれ正確なバージョンに固定されているので、その旨を記したリリースなしに中身が変わることはありません。任意の機能である転送品質の連続マッピングは、小さなテスト HTTPS 転送と定期的なバーストに公開の Cloudflare Speedtest エンドポイントを使います。これはインターネットの最大速度の測定ではありません。このモジュールは既定でオフです。解除を購入した場合、購入報告が1件だけ端末から出ます。測定データは含みません。詳しくは プライバシーポリシーをご覧ください。エクスポートには、機微な位置データや周囲のネットワークの識別子が含まれることがあります。
仕組み
センサーから、
ファイルの1行へ。
どのソースも自分のペースで動きます。サンプルには時刻と最後に分かっている位置が刻まれ、ブロックしないキューを通り、まとめてローカルのデータベースへ保存されます。図中で下線の付いたキーの説明は データ辞書.
収集の設定
測定を始める前に、アプリが各ソースについて提示するのと同じパラメーターです。範囲とデータ量の見積もりは実装と一致していて、変更は上の図にすぐ反映されます。
ms
範囲 10–1000 ms
ms
範囲 100–60000 ms
s
範囲 5–300 s
s
範囲 5–60 s
s
範囲 5–300 s
インターネットマッピング連続測定に使うネットワーク
両方を選ぶと、別々の Android Network ハンドルが同時に動きます。
ms
範囲 500–5000 ms
KiB
範囲 1–1024 KiB
KiB
範囲 1–256 KiB
s
範囲 10–300 s
KiB
範囲 64–10240 KiB
KiB
範囲 8–2048 KiB
407 MBマッピング 30 分あたりに使うデータ量の上限見積もり
8 4007つのセンサーからの毎分のサンプル数
120インターネットマッピングの毎分のサンプル数
2010 分あたりの Wi-Fi とモバイルのスキャン回数
この見積もりは上限です。回線が遅ければ1サンプルに時間がかかり、同じ時間に入る数が減って転送量も少なくなります。これは最大速度の測定ではありません — 理由.