Sweep is a scanning aid for rooms you do not control: a hotel room, a short-term rental, a borrowed car. Walk around for two minutes and Sweep looks for two real things. Bluetooth trackers: Sweep listens to Bluetooth broadcasts and shows which devices stayed with you for most of the sweep, how their signal behaved, and what type of device they announce. Cameras on your Wi-Fi: Sweep scans the Wi-Fi network you are connected to and looks for open video stream ports and for the names and services devices announce. One weak sign alone is listed as "worth a look", not counted as a camera. What no phone can see: a camera that is switched off, not connected to any network, or on a different network is invisible to any phone app. Many hotel and guest networks hide devices from each other. If part of a sweep could not run, the report says which part. An empty report is not proof that a room is clean. Sweep deliberately has no magnetometer "camera detector": a compass finds metal, not lenses. Free and paid: sweeps, finding counts and the type of a device that stayed with you are free. Sweep PRO is an optional subscription that unlocks addresses and evidence, the full device list, PDF reports, saved reports and comparison, "Mine" labels, signal history and the guide to reading a result. Copies of Sweep older than 1.1.0 sold a one-time unlock instead; anyone who bought it keeps it. Prices are shown in the app and on Google Play. No account, no ads, no analytics, no server. Nothing you scan leaves your phone. Bluetooth scanning uses BLUETOOTH_SCAN with the neverForLocation flag: Android 12 and newer has no location permission for Sweep. On Android 11 and older the system requires a location permission for Bluetooth scanning; Sweep does not read or keep your location. The local network scan uses INTERNET, ACCESS_NETWORK_STATE, ACCESS_WIFI_STATE and CHANGE_WIFI_MULTICAST_STATE.