SigScan

SigScan is a signal radar for the iPhone. Every Bluetooth device nearby is named, ranged and placed: in augmented reality and on a compass radar that turns as you do. Trackers that should not be there are flagged, and NFC tags, the joined Wi-Fi network and HomeKit accessories are read the same way.

Radio gives distance, never direction, so SigScan does not pretend. A device waits by its distance until its direction is measured: the AR sweep pins one, or you hold the phone out and turn once. Your body shadows each signal, so every device reads strongest when you face it, and each is placed with a margin that widens when the evidence is weak.

Naming is the harder half. The complete industry registries ship inside the app, the chip maker and the brand are kept as separate facts, and where a manufacturer publishes its format the model is read from the packet. There are no accounts, advertising or analytics, and scans stay on the phone. Ask AI is the one exception: your question goes out with a summary of nearby devices and recent scan events, never your location.