Perimeter vs PERIMETER Radar

AWARENESS FOR THE CONNECTED WORLD Perimeter helps you understand the connected technology around you. Built with patent-pending technology, Perimeter observes supported wireless signals and helps identify patterns that may be consistent with potentially unwanted trackers, smart glasses, and other privacy-relevant devices—then surfaces what deserves your attention. QUIET MONITORING Perimeter can monitor supported Bluetooth activity in the background and notify you when a finding meets its alert criteria. When nothing meaningful appears, it stays out of the way. SCAN YOUR SURROUNDINGS Use Area Scan for a quick look at nearby Bluetooth activity and anything Perimeter believes deserves a closer look. CHECK A PLACE Take a closer look at a hotel, rental, room, or unfamiliar location using Bluetooth observations, local-network clues, and optional guided physical checks. JOURNEY MODE Look for relevant signals that persist as your surroundings change—helping distinguish something that stays with you from activity that simply happens to be nearby. SMART-GLASSES AWARENESS Perimeter can surface supported signal patterns that may be consistent with smart glasses, while clearly communicating the strength and limitations of the available evidence. FOUND A PHYSICAL TRACKER? Photograph what you found, check compatible NFC information, and review practical next steps. PRIVATE BY DESIGN Perimeter processes observations on your iPhone. No account is required, and your scan history and location context remain on your device. HONEST ABOUT LIMITATIONS Wireless detection has real limits. Perimeter cannot detect every tracker, camera, recorder, wearable, or surveillance method, and some nearby devices may produce no signal your iPhone can observe. Perimeter separates observation from identification and communicates uncertainty when the evidence is incomplete rather than guessing. Perimeter is designed to provide awareness, context, and practical next steps—not a guarantee that an environment is safe.

PERIMETER Radar is a passive Bluetooth awareness app. See nearby BLE devices on a live radar, classify phones, watches, trackers, and IoT gadgets, listen to public scanner radio streams, and explore open map layers. Processing stays on your iPhone. The app listens only — it does not connect to or control nearby devices.