Fieldwatch 1.1.26 is now available which includes two small updates: Remote ID gets smarter. When a drone broadcasts its operator location, Fieldwatch now tells you what that point is: the takeoff spot, a live pilot GPS position, or a fixed point the aircraft declared. You'll also see the operator's altitude when it's known, whether the drone's height is above takeoff or above the ground, and the EU category and class when the drone reports an EU classification. More control over your ATAK map. GNSS hits now drop a pin, or an ellipse that stretches along your path until the interference ends. Choose how long marks and radio spots stay: 1, 6, or 24 hours, or until deleted. Radio spots keep their names after the radio leaves. Fieldwatch is free and open source. It works offline with no account, no ads, and no backend. It's receive-only on Android and can help identify the Wi-Fi and Bluetooth devices around you. For those who are interested, I added some technical detail to the user manual on how GNSS interference and spoofing detection works.

Interesting validation for Fieldwatch. 🛰️ In Feb 2025, the @AFResearchLab reportedly awarded a $1.74M contract to use ordinary phones' raw GNSS data to detect jamming and spoofing and send alerts into TAK. It's being field-tested in Ukraine and in US military exercises. Fieldwatch 1.1.25 already does the core of that on your own phone. Its detection builds on published research from the University of Colorado Boulder, the European Commission's Joint Research Centre, and Politecnico di Torino, along with Google's Android GNSS guidance. That's likely the same body of work behind efforts like that one. When it sees signs of interference or spoofing, Fieldwatch drops a mark on the ATAK map where you were. If the hit lasts while you're moving, the mark stretches into an oval along your path. With a few Fieldwatch phones on the same TAK network, your team's map starts to show where GNSS is affected, with no server needed. The difference is that the funded project is a commercial SDK built around a central server. Fieldwatch runs entirely on the phone, works offline, and is free and open source. github.com/OffGridPete/Field…

Fieldwatch is a free, open-source Android app that can help identify the devices around you, including what might be watching or following you: trackers, cameras, drones (it even decodes their Remote ID), body cams, and more. It can help identify almost 250 device types, and you can add your own. It listens to nearby Wi-Fi and Bluetooth signals and compares them to a built-in signature database. It only receives, never transmits. No account, no ads, no back end, and it works fully offline. What's new: Fieldwatch 1.1.22 adds GPS jamming and spoofing detection, using the receiver that's already in your phone. 🛰️ When your GPS suddenly changes, Fieldwatch lets you know right away: * A popup with details of the interference * A voice alert * A red diamond on your path where it happened * The details saved in your sit * An optional note on your TAK marker It needs a one-time calibration. Choose your sensitivity and you're set. For best performance, keep the phone in a dash holder, or on your chest rig when you're on foot. Also in this build: weak pairing floods stay quiet while you're driving, and a real flood can leave a note on your TAK marker until it ends. Easier setup: Live now shows a banner when Location is off, and Diagnostics opens with a "What to check" list that names the exact switch that's off. The only official release is on my GitHub, link in bio. Each release lists the APK hash and signing certificate so you can check your build. Coming next: a localization framework. I'm building a proper translation system for Fieldwatch, so translating the app will mean filling in a language file instead of forking the codebase and hand-editing text buried in the code. If you've offered to help translate, thank you, and please hold off for now. Once the framework lands, your work will be much easier and won't break with every update.

Fieldwatch 1.1.18 is out! Reports got a real overhaul, you can silence a radio that’s yours, and the app now spots basic Bluetooth and Wi-Fi floods before they wreck a sit. Fieldwatch listens for nearby Wi-Fi and Bluetooth signals and identifies the devices sending them, such as tracker tags, body cameras, drones and in-car Wi-Fi. It does this using a list of device signatures you can edit in the app. You can get an alert when a specific device type or address shows up, and you can record a session in one place or along a drive, then compare it with later visits. Fieldwatch can also spot devices that seem to be moving with you and build reports from everything it picked up. What’s New Reports you can actually read. Debrief and Compare open with counts and bar charts instead of a wall of radios. By default you see what matters: Extra attention, a custom name, Mine, or a bookmark. Compare also flags a decoded value that changed. Full roster is still there: Reports → Sit report → Show all radios. Mark it Mine. On a radio you can already name, Mine stops the beep, voice, flash, vibrate, and card for that one radio. Everything else of that signature still alerts. Reports file it under Marked mine and keep it out of the co-travel callouts. Hide my radios takes it off the live list. The sit and the log still keep it. Floods don’t get to trash the data. Live warns when a burst of new Bluetooth pairing popups or names hits at about the same loudness, or when a pile of new Wi-Fi names shows up in one scan and is gone on the next. Thanks to GitHub user edwin042331-hue for the ideas behind this. Debrief keeps one Flood line instead of counting every address. Hide this burst pulls that burst off the live list and keeps alerts quiet until it would have faded on its own. The log still has them. Catalog 90, more drones. Tello, Potensic, Holy Stone, Hubsan, Yuneec, SwellPro, Crazyflie, and Parrot (including Skycontroller). Bookmarked, no Extra attention. Remote ID also labels the French Direct Remote ID plate, and can name Freefly, BRINC, and Teal from the serial. The row stays Remote ID.

Fieldwatch 1.1.14 Update Fieldwatch listens for nearby Wi-Fi and Bluetooth signals and identifies the devices sending them, such as tracker tags, body cameras, drones and in-car Wi-Fi. It does this using a list of device signatures you can edit in the app. You can get an alert when a specific device type or address shows up, and you can record a session in one place or along a drive, then compare it with later visits. Fieldwatch can also spot devices that seem to be moving with you and build reports from everything it picked up. What’s new: See where you’ve been. The Reports screen now draws your route as you drive, the last 15 minutes or a full session. Stops show as green, flagged devices as red, and bookmarks as blue. Each device gets one numbered marker at its strongest signal. With online maps on and Privacy mode off, the route sits on a street map. Otherwise it’s a plain line. Video (sped up) shows a path that updates every few seconds as you drive. It’s on the Reports tab. Better PDF reports. Debrief and Compare PDFs now include that same map. Sessions, explained. A session (a "sit" in the app) is a named stretch of time and the devices heard during it. Session export lists each device once. Log export is the full running record. Drone detection. Fieldwatch now reads Remote ID, the digital license plate most drones broadcast, over Bluetooth and Wi-Fi (Android 11+ for Wi-Fi). In TAK mapping apps, each drone shows as one moving marker, with a second marker for the pilot. It works best when a drone hovers nearby. More accurate identification. Google Find Hub trackers, readable tire pressure sensors (including Teslas while awake), Flock's battery pack and gunshot microphone, and Axon body cameras are all identified more reliably. Smart glasses from Meta, Snap and Vuzix are still flagged. You can update the device signature catelog from GitHub when you're online. Signature catalog 81 can now identify up to 242 types of devices. Bug Fixed: A signal strength of 127 means Bluetooth couldn't measure it, not that the device is close, so hunting mode and shared reports now ignore it.

Fieldwatch listens to Wi-Fi and BLE and identifies radios around you from a signature catalog you manage in-app (tags, body-cams, drones, vehicle APs, etc.). Set alerts when a watched signature or MAC is heard. Work a sit to compare the same area or drive over time. Track radios moving with you and generate reports from that data. Here is what’s new since my last update: Fieldwatch 1.1.8 is on GitHub. Signature catalog is now 75. Name Wi-Fi the way you already name BLE: fleet cars, mesh, guest APs, and the locally administered BSSIDs that used to hide the pencil. If your local fire trucks trip the Compex signature, edit the Advertised name to “Fire Truck Station 51.” Works on any radio Fieldwatch treats as a non-rotating MAC. Manage named radios under Settings. The Detail page now describes the radio from the signature match. A Raven on Wi-Fi Direct reads as a gunshot sensor. New signatures for privacy awareness: Digital Ally and other body/in-car cameras, wearable recorders, camera glasses, and roadside names Fieldwatch can hear. Since 1.1.4 you can refresh the stock catalog with Update stock catalog from GitHub under Settings. Add observer notes to a radio: a short caption you write. It shows on Detail, as a chip on the Live list, and in every report. Walk the ground, then see the walk. Path is a north-up trace of this phone for the sit you named. Red dots are Extra attention. Blue dots are radios you named. Dots mark where you were when you heard them — not a pin on the other radio. Works offline in Airplane mode. The same trace prints on Debrief and Compare PDFs. Two rooms, two days, one question: what was only here? Compare sits is presence only — only in this window, only in the other, or in both. Kind plus MAC. Text, PDF, and a paste-ready AI addendum. Not a second inventory for a chatbot to reprint. Export logs or sits as CSV, JSON Lines, GPX, KML, or WiGLE CSV. Plus a lot of cleanup. If you haven’t pulled the latest APK in a while, this one is worth it. The user manual is updated to match.

Noticed the Fieldwatch radar sweep had stopped sweeping. I admit this is a bit of a silly view, maybe, but it is still the fastest way to see the whole field at once. Blips are louder (closer) toward the center. Signature matches are the bigger dots, in that family’s color; unmatched radios are smaller. A watchlist hit pings, then keeps a phosphor ring so you can still find it. Tap a blip for that radio’s detail. Pinch to zoom; double-tap resets. Ver. 1.0.6: the sweep moves again, and fades off the beam. github.com/OffGridPete/Field…