PrivacyScan is a hidden camera detector app for iPhone with real limits, and this page states them plainly. It helps you check a hotel room, a vacation rental or a changing room for devices that should not be there.

What it does: it lists every device advertising a service on the Wi-Fi network you are connected to, with its name, IP address and services, and scores each one on how much it looks like an IP camera (RTSP, ONVIF, recorder and camera-style names). It lists nearby Bluetooth Low Energy devices with signal strength and estimated distance, and flags camera-style names. A room inspection walks you through 29 checkpoints in 5 groups, such as smoke detectors, sockets, USB chargers, alarm clocks, picture frames and vents. The torch with a live camera preview lets you sweep surfaces for the small bright dot a lens can reflect. The whole inspection exports as a PDF report. In effect it is a hotel room camera detector that gives you leads and a checklist, not a verdict.

What it cannot do: an iPhone has no radio receiver an app can reach, so there is no RF sweeping, and apps that animate a radar dial and call it RF detection are showing an animation. It cannot find a camera that records to a local card and never touches the network, or one on a different Wi-Fi network. The torch sweep is you looking at a screen, not a detector, and most iPhone cameras filter out the infrared that covert cameras use. A high camera score is not proof: a recorder and a doorbell look alike from the outside, so treat it as a reason to walk over and look.

Scanning is local, nothing is uploaded and there is no account. The core app includes the scanners. The optional Pro upgrade adds unlimited scans, the full device list, saved reports and PDF export.