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The privacy policy and update check now use the new site address, markarov.dev. The old address keeps working for now, but it will be retired. Nothing else changed.
Hidden device detector and Bluetooth scanner. Check a hotel room in 90 seconds.
See what is transmitting around you: tracking tags, Bluetooth gadgets and Wi-Fi access points. Check a hotel room in 90 seconds, or let the app notice a tag that travels with you. ANTI-SPY SCANNER is a hidden device detector that listens on four radio channels at once and names each device in plain words. Tracker detector Apple Find My tags such as AirTag, Google Find My Device tags and Tile broadcast in a published format, so the app marks them as trackers straight away. Samsung tags are marked as possible tags, because other Samsung accessories send the same signal. Room check Keep the screen on. For 30 seconds the app measures the room's usual background, then it listens for another 60. You get three numbers: devices seen, how many of them are yours and how many are louder than the background, plus one sentence on what that means. The result can be shared. Hunt for a tag that follows you A stranger's tag gives itself away by staying with you, while a neighbour's router falls behind. The hunt flags a device heard for more than 8 minutes in at least three places while you travel over 250 metres. It keeps watching with the screen off. Tap "It is mine" or save a device with the star to take it off the hunt. Radar Pick a device, turn slowly on the spot, then walk. The compass and gyroscope hold the bearing, and a ping speeds up as you get closer, so you can search without looking. Map Every measurement lands on an OpenStreetMap coverage map, one colour per channel. A device heard from four places or more gets an estimated position. Hidden camera search The magnetometer finds the magnet a covert camera is often mounted on. In the dark, the viewfinder shows the infrared light of a night-vision lens as pale violet dots that your eye cannot see. The torch helps you spot the glint of a lens yourself. This is not an optical hidden camera detector: a find shows where to look and proves nothing. Four channels in one list • Bluetooth LE: tags, watches, earbuds and sensors, several updates per second. • Bluetooth pairing mode: headsets and speakers waiting to connect. • Wi-Fi: access points with band, channel and security. 802.11mc points also give distance by time of flight. • Cellular: the serving tower and its neighbours, from 2G to 5G. A built-in reference says what a signal usually is: tyre pressure sensor, TV, printer, phone hotspot, camera with its own Wi-Fi network. A bug or other hidden device shows up only if it broadcasts over Bluetooth or runs its own Wi-Fi network. Good to know This is a radio scanner around the phone, not a check of the phone for spyware. Cameras are searched for indirectly, by magnet and infrared, and neither technique is proof. The app cannot find a camera that records to a memory card, a wired microphone or a GPS tracker that reports over the mobile network. Wi-Fi shows access points only, so a camera on the hotel's own network does not appear. Distance and direction are estimates. Android allows four Wi-Fi scans per two minutes, so Wi-Fi rows refresh about every 30 seconds. Devices with a private address change it about every 15 minutes, so marking one as yours does not last. A device on the list is not proof that anyone is watching: neighbours have speakers, and parked cars have tyre sensors. The screenshots show the built-in demo, marked DEMO. Privacy Android gives Bluetooth and Wi-Fi scan results only with location access. Coordinates draw your map and stay on the phone. The network is used for OpenStreetMap tiles of the area you view, a check for a newer version and, only if you switch them on, anonymous usage statistics. Scan results are never sent anywhere. Interface in English, Polish and Russian: the phone's language or the one you pick in settings. Independent development: one person builds and maintains this app. A letter to support@markarov.dev is read by that person, not by a support desk.