Description
Finding out how many Wi-Fi access points and Bluetooth devices are broadcasting around you usually means buying a dongle, tethering it to a laptop, and signing up for an account to see the data. Fieldwatch drops all of that: it just listens on your phone to nearby Wi-Fi access points and Bluetooth LE advertisements, transmits nothing, needs no extra hardware, no account and no backend server, and works offline.
Its standout piece is a built-in signature library: access control, cameras, drones, finder tags, smart glasses, home IoT and routers are recognized and grouped by class instead of showing as a wall of MAC addresses. When you want to find one device there is a hunt mode that shifts from "far" to "very close" live, with optional beeps or vibration. Privacy mode masks the last three octets of every MAC, so a screenshot you share does not leak full addresses. It needs Android 10 or later, is MIT licensed, and the APK sits in the repo's dist folder for sideloading.
Passive scanning:Receive-only, Wi-Fi and Bluetooth LE together, with a signal-strength trace and first and last seen time for every device.
Signature matching:Over two hundred signatures grouped into access control, cameras, drones, finder tags and more, and you can pull candidates from unmatched radios to create your own.
Filtering engine:Narrow by class, signal strength or radio type so you are not scrolling through hundreds of devices.
Hunt mode:Lock onto one device and follow distance hints, with a beep or vibration, until you reach it.
Sits and comparison:Save a stretch of scanning as a sit, replay the path, compare two sits, and spot devices that keep showing up alongside you.
Exports:Logs as CSV or JSON, plus GPX, KML and WiGLE CSV.
Privacy mode:Masks the last three MAC octets and GPS coordinates so shared screens stay safe.
Its standout piece is a built-in signature library: access control, cameras, drones, finder tags, smart glasses, home IoT and routers are recognized and grouped by class instead of showing as a wall of MAC addresses. When you want to find one device there is a hunt mode that shifts from "far" to "very close" live, with optional beeps or vibration. Privacy mode masks the last three octets of every MAC, so a screenshot you share does not leak full addresses. It needs Android 10 or later, is MIT licensed, and the APK sits in the repo's dist folder for sideloading.
Features
Passive scanning:Receive-only, Wi-Fi and Bluetooth LE together, with a signal-strength trace and first and last seen time for every device.
Signature matching:Over two hundred signatures grouped into access control, cameras, drones, finder tags and more, and you can pull candidates from unmatched radios to create your own.
Filtering engine:Narrow by class, signal strength or radio type so you are not scrolling through hundreds of devices.
Hunt mode:Lock onto one device and follow distance hints, with a beep or vibration, until you reach it.
Sits and comparison:Save a stretch of scanning as a sit, replay the path, compare two sits, and spot devices that keep showing up alongside you.
Exports:Logs as CSV or JSON, plus GPX, KML and WiGLE CSV.
Privacy mode:Masks the last three MAC octets and GPS coordinates so shared screens stay safe.
