Twenty years ago, we never imagined we’d be googling for the best hidden camera detector on the market, unless perhaps you watched too many spy movies. Back in the day, cameras were big, bulky, and looked like Wall-E, which made them easy to spot from afar. If they were jammed into a smoke detector or lodged into a lamp shade, it would completely obvious.

But as technology advanced, surveillance cameras and baby monitors became a lot smaller and cheaper. They became readily available for anyone, and some people began to use them for reasons other than theft deterrence and monitoring.

Fast-forward to 2026, and hidden cameras have now become a problem in hotels and other short-term rentals, notably Airbnbs. In fact, a recent IPX1031 survey of 2,000 Americans showed that 11% of the respondents had actually found hidden cameras in their lodging.

Despite Airbnb’s tightened policies regarding hidden cameras, not all hosts follow the rules, and with cameras as tiny as a pebble, it’s easy to see why some people can get away with their offenses.

With Spring fast underway and warm temperatures spreading throughout the country, we strongly encourage you to bring a hidden camera detector when you’re planning to spend the night at an Airbnb or any type of accommodation. It pays to be safe rather than sorry.

How Does a Hidden Camera Detector Work?

Hidden camera finders use one or a combination of the following methods to locate concealed devices.

🔊 RF Detection (Radio Frequency)

Wireless live cameras need Wi-Fi to transmit audio and video in real time, so a hidden camera finder with radio frequency detection will scan the room for radio frequencies of 2.4 GHz or 5.8 GHz. The only downside is that the spy camera detector may not work if the concealed device isn’t connected to Wi-Fi or is simply recording to internal storage instead of simultaneously sending data to someone else’s phone or computer.

💡 Lens Detection (Infrared Scanning)

Camera lenses reflect light in a unique way, and that makes for a vulnerability you can exploit with an infrared-enabled hidden camera detector. By emitting infrared light, the device causes hidden cameras to shoot back tiny, bright reflections that make it a cinch for you to see. Since all cameras have a lens, this makes it a more reliable method than those that use radio frequency detection.

⚡Magnetic Field of Detection

This type of hidden camera finder allows you to locate spy cams that are either turned off, not actively transmitting, or temporarily disconnected from Wi-Fi. But because this method uses magnets, you’ll have to probe closely among objects, and it takes a bit more “hands-on” work than infrared or thermal scanning.

🌡️ Thermal Imaging

Some people may use wired hidden cameras so that they won’t have to worry about Wi-Fi glitches, plus the image quality is often much better. As for the wires, they can simply tuck them inside walls or vents. So unless you check every nook and cranny, it can be pretty tough to find the spy cam. But with a handheld thermal camera, you can find them even when they’re hidden in the most unexpected places or when they aren’t actively transmitting data. That’s why these detectors tend to sit at the higher end of the price range.

Can a Cellphone Detect a Hidden Camera?

There are blogs that may tell you your smartphone and some free downloadable apps are enough to detect hidden cameras. Unfortunately, many of these apps are simply glorified Wi-Fi scanners that notify you if there’s a wireless signal in a room, which isn’t very helpful because most modern devices need a Wi-Fi connection these days.

Even hidden camera detectors that measure RF signals may often just pick up interference from your own phone, perhaps from a robot vacuum, and other harmless electronics.

Another thing to remember is that some hidden cameras don’t use Wi-Fi, which means they are completely untraceable to any network-based app. Not to mention, smartphones have built-in infrared filters to make your photos look more natural.

Why We Recommend the SDK Store Hidden Camera Detector

If you really want to be sure, it’s much better to use a dedicated, infrared-enabled hidden camera detector, like the SDK Store Viewfinder that you can find in our store. It comes equipped with a 3D sensing chip and 4 high-intensity LEDs that make any camera lens glow like a bright red beacon.

Using it is pretty straightforward. You simply need to hold the eyehole viewfinder up and scan the room. This detector looks for the physical glass of the lens itself, so it works whether the spy cam is wired, wireless, or even turned off.

This little gizmo arrives well-packed and includes its own USB-C charging cord. Because it’s so light and compact, you can add it to your self-defense keychain so that you can use it as an anti-peeping tool in public bathrooms and fitting rooms.

How Do I Check If There’s a Hidden Camera in My Room?

The first step, given that you already have an infrared-enabled spy cam detector, would be to turn off the lights before you begin to search for the following areas.

🔥 Start with the Fire Alarm

You’ll want to start your search with the fire alarm or smoke detector because many of the reported “horror stories” involve one. Malicious people like to install a hidden camera there since it sits so high; it can capture a wide and unobstructed view of the room. Since the law also requires hotels and rentals to have them as a standard fixture, they often don’t look out of place or draw suspicion.

🔌 Check Electrical Devices

When you’re checking a room for hidden cameras, the two most important things to remember are that every camera needs a clear line of sight and a power source if it’s wired. Because of this, you can anticipate people to hide them in objects that are already plugged in, mounted high up against a wall, or sitting at eye level.

🧱 Check for Holes and Gaps in Walls

Any hole that looks a bit too perfect to be a scratch or a nail pop is worth a closer look. People may sometimes try to camouflage it by painting around it, but it should flicker back when you use an infrared-enabled hidden camera detector. 

🎍 Inspect Everyday Objects

Wireless spy cameras come in various shapes and sizes, and some of them can look like something else. Since they’re running on batteries, sneaky people can tuck them into almost anything. 

So check the desk and the knickknacks on the bedside table because they’re already sitting at eye level and pointing right at the bed. If there’s a digital clock, you’ll want to thoroughly examine that because some of those can have a built-in spy camera.

And don’t overlook room decor, such as picture frames, potted plants, and figurines. Plugged-in air fresheners may also hide a spy camera.

🪞 Don’t Forget Mirrors and Sinks

Finding a hidden camera behind a two-way mirror is much more common in movies than it is in real life, but if you’re too anxious that it might happen to you, you can do the finger test. Simply poke the mirror and see if there’s any gap between your finger and its reflection. You could also tap the mirror to see if it creates a dull sound; otherwise, it may indicate there’s a hollow space behind it.

What to Do If You Find a Hidden Camera

It can be tempting to storm out of your room and confront the receptionist or the owner of the rental about the hidden camera, but an aggressive confrontation could quickly turn into a potentially dangerous situation, especially if you’re alone.

The wisest thing to do is to stay calm and document everything without smudging fingerprints on the hidden camera. It’s important not to disrupt how the spy cam was concealed because if this ever reaches a courtroom, you don’t want the owner claiming that you planted it to cause him trouble.

Once you have your photos and videos from multiple angles, you’ll want to call the police right away. If you noticed that the host has seemingly become too attentive or has made you feel uneasy, it’s best to head to a nearby cafe to make your phone calls.

If you’re staying at an Airbnb, you’ll want to use the “Report this listing” feature, call their 24/7 Safety Line, and send them the evidence.

Final Words

The use of hidden cameras in short-term accommodations is a rising concern, and because a whole industry has sprung up to create spy cams and other gadgets, it can be increasingly difficult to recognize them with the naked eye.

While it’s true that high-end hotels usually wouldn’t risk their reputation by allowing something like this, expensive stays aren’t always an option for everyone. Even though this is a massive criminal offense, some people think they can get away with it. The best thing we can do is to stay cautious and prepared, rather than being complacent.