How to check a hotel room for hidden cameras

Most hidden cameras are small and placed where a guest would not look twice: a smoke alarm, a clock, a charger or a vent. You can do a useful check in about ten minutes, with no equipment beyond your phone.

No check can prove a room is camera-free. A camera that is switched off, well hidden or not on Wi-Fi can be missed. Use the steps below to cover the common spots, and if you still feel unsafe, ask the front desk for another room or contact the police.

Before you start

• Check the room while you are alone and the door is closed.
• Charge your phone, turn on the torch and keep the phone's camera ready.
• Give yourself about ten minutes for the room.

Step 1: Lights off and torch on (lens glint check)

Turn the room lights off and wait a few seconds for your eyes to adjust. Turn on your phone torch and sweep it slowly across the room: the TV, the smoke alarm, the clock, the mirror, the picture frames and the bathroom.

A camera lens can reflect a sharp, bright point of light straight back at you. Look for a point that stays in one place as you move the torch, and that flashes or glints at a different angle.

Mirrors, glass, jewellery and shiny plastic also reflect light. Every glint needs a second look. Move the torch to a new angle and see whether the point behaves differently. Anything you cannot explain needs a closer look.

Step 2: Infrared check in the dark

Some night-vision cameras use infrared LEDs, which give off light that people cannot see. Many phone cameras can see a faint glow from these LEDs, but not all phones do. Some filter infrared out, so a blank result does not prove anything.

With the room dark, open your phone's camera app and point it at the spots you checked. Look for small, bright dots on the screen that stay in place.

Step 3: Smoke alarms, clocks and chargers

These are the most common hiding spots in rental rooms.

• Smoke alarms: look at the edge, not just the middle. A camera can sit behind a fake alarm. Look for a lens, a ring of holes or a second light.
• Clocks: look for a small hole, a flat lens or a light that does not match the clock.
• Chargers and USB plugs: check the plug and the cable hole. Be careful with anything plugged into the wall that you did not bring.

Step 4: Vents, mirrors and picture frames

Vents: check the grille and the gap behind it with the torch.

Mirrors: a mirror that hangs on the wall is usually fine. One set into the wall is worth a closer look. With the room lights off, press your phone torch flat against the glass and cup your hands around it. If you can see a space or a lens behind the glass, report it. The popular fingernail test is not reliable, so don't count on it.

Picture frames: look at the glass and the back of the frame.

Step 5: The bathroom

Repeat the steps in the bathroom. Check the smoke alarm, the vent, any shelf or shampoo holder, and the mirror. Bathrooms and changing areas are where people most want to check, so give them extra time.

Step 6: Wi-Fi devices

Some cameras connect to Wi-Fi. If the hotel gives you a router or device list, look through the connected devices. Names you cannot place are worth asking about at the front desk. Cameras that are off, wired, or on a different network will not show up.

Where the app helps

Doing these steps by hand works, but it is easy to lose track of what you covered. Hidden Camera Sweep walks you through the same steps, one screen at a time:

• It asks you to pick the room and tick the hiding spots you can see.
• It runs the lights-off infrared pass and the torch glint pass, and it flags possible lenses on screen.
• It scans the Wi-Fi network you are on for devices that answer like cameras.
• It builds a report that shows what was found, what was checked and what the sweep could not check.

Sweeping is free. The report is a subscription. Everything stays on your phone, and the app does not say a room is clear. Its score shows how much of the room the sweep covered.

Frequently asked questions

Can a phone find every hidden camera?

No. No phone, app or device can prove a room is camera-free. A phone can help you look at likely spots and notice some lens reflections and some infrared glow. It can miss cameras that are switched off, well hidden or not on Wi-Fi.

What is the fastest way to check a hotel room?

Turn the lights off, sweep the room with your phone torch, then check the smoke alarm, clock, charger, vent and mirror. This takes about ten minutes.

Does a lens glint always mean a camera?

No. Glass, mirrors, jewellery and shiny surfaces also reflect light. A glint that stays in one place when you move the torch needs a closer look.

Will infrared work on my phone?

Some phones can see infrared and some cannot. If your phone does not show anything in the dark, that does not mean the room is clear.

Can I check a short-term rental the same way?

Yes. The same spots apply. Ask the host if you are worried, and report anything you find to the platform and the police.

What should I do if I find something?

Do not touch or unplug it. Take photos, leave the room if you feel unsafe, and call the police. Tell the front desk or the host. You can also contact a professional sweep service.

Is the app free?

Sweeping is free. Opening a report needs a subscription, which is shown before you start.