Bluetooth Scanner Signal Guard

See nearby signals and check the evidence behind possible device labels. Signal Guard inspects Bluetooth broadcasts and Wi-Fi access points exposed by Android. Review signal strength, observation times and broadcast fields in a clear, focused interface. A possible label is a pattern match: it cannot confirm a device model, its owner, recording or surveillance.

Start monitoring when you choose and watch selected Bluetooth addresses. Repeated-observation alerts apply only to watched addresses. With the screen off, scanning covers addresses already observed since Bluetooth scanning last started. Keep the screen on to discover new or rotating addresses. Wi-Fi observations do not receive movement alerts.

No account, app server, ads or analytics. Saved radio addresses, broadcast names and your labels are encrypted locally. History stays on this phone until you delete it or deliberately export it. Exports omit radio identifiers and names by default; your labels and location coordinates are always excluded. Review an export before sharing it with another app.

Android may require precise location access and location services for Wi-Fi scanning. Optional movement observation uses temporary location fixes, without saving coordinates or a route. It is experimental and cannot establish pursuit. Silent, sleeping or unsupported devices may be missed. A quiet scan does not establish that an area is safe.