Signs of a hidden camera: full checklist

Hidden cameras follow a well-defined pattern: whoever installs them looks for objects that already exist in the room, with power available and a useful viewing angle for whatever they want to record. Knowing the 10 most common spots speeds up any check considerably, in any type of environment.

This is exactly the kind of check a good hidden camera detector automates, covering the 10 spots below in a few seconds.

The 10 most common spots

1. Smoke detectors: already have power and sit on the ceiling with a wide view of the entire room.
2. Alarm clocks and desk clocks: almost always facing directly at the bed.
3. Outlets and USB chargers: already plugged in, disguised as a cheap, ordinary electronic.
4. Wall hooks and hangers: common in store fitting rooms and hotel rooms.
5. Large mirrors: can be two-way fake mirrors (use the fingernail test to check).
6. Artificial plants and picture frames: classic hiding spots in living rooms and Airbnbs.
7. Speakers and smart assistants: some models ship with a built-in camera from the factory.
8. Routers and Wi-Fi extenders: used by devices broadcasting on their own separate network.
9. Shelf and furniture screws: can conceal a button-sized mini camera.
10. Gaps in doors and partitions: used for pinhole cameras aimed from outside in.

How to check each spot quickly

For the powered items (1, 2, 3, 7, 8), the focus should be checking whether the object faces a private area (bed, fitting area, bathroom) and whether it looks “too new” or out of place for the room. For the physical items (4, 5, 6, 9, 10), the check involves looking closely for mismatched screws, testing mirrors with your fingernail, and inspecting gaps at eye level.

A recommended checking routine

Combine three steps, always in this order:

1. Visual inspection of the 10 spots above with the lights on, paying attention to anything facing private areas.
2. The flashlight trick in a darkened room, to catch lens glare on smaller or less obvious objects.
3. Magnetic-sensor and Wi-Fi network scanning using a dedicated app, which helps cover corners and objects the eye alone can miss.

How often to check

It’s worth running this full check whenever you enter a new space where you’ll change clothes or spend the night: hotels, Airbnbs, motels, and even store fitting rooms. In places you’ll stay for several days, quickly repeating the check after any room maintenance (cleaning, item swaps) is also good practice.

How Sonar covers the whole list

Instead of memorizing the 10 spots and checking each one manually, Sonar guides this entire sweep in a single flow: the app uses your phone’s camera for the flashlight trick, its magnetic sensor to identify magnets hidden behind mirrors, shelves, and frames, and a network scan to find devices streaming live. All processing happens on the device itself, so you can repeat this full routine in seconds, in any new environment, without needing an internet connection.

Related reads

• How to detect a hidden camera in a hotel room
• How to tell if there's a hidden camera in an Airbnb
• Fitting room hidden cameras: what to check before you undress