How to detect wired camera?

[ Step by Step guide ]

Hello everyone.

Let’s talk on how to detect wired camera using your android and iPhone devices.

In many places hidden camera is installed by premise owner in such a way that it is invisible to the victim. These cameras can send image/ video data (could also be a live stream) through a wired network. These cameras could also be connected to a display or memory units like hard disc/ memory card etc.

It is very difficult to detect hidden wired cameras, but thanks to “magnetic sensor” in all modern android and iOS devices.

Lets see step by step guide to detect wired camera –

Step 1 : Download hidden camera detector app on your android (Click here to download) or iPhone (Click here to download)

Step 2: Select “Detect Wired camera” option. If you see a message “No magnetic sensor” on your android device, then use different android device that has magnetic sensor.  iPhones and iPads already have magnetic sensor for all of its variants.

Step 3: Once you started to see numbers on the screen, app should show “No camera detected”.

Step 4: If app starts beeping immediately after you open the app or without having any camera nearby, then wait for a moment and let readings stabilize. If it continues to beep then magnetic sensor in your device needs recalibration.

To recalibrate, just rotate your phone in horizontal 8 direction. Watch this 9 second video on how to do that.

Also check if there is any electronic device nearby like microwave oven or refrigerator.  Try to avoid electronic influence as much as possible. App may give you false signal if it is influenced by electronic device other than camera.

Step 5: Now once readings are stabilized and app is not beeping, find objects that you have suspect on like flower pot, pens, screws, lamps, hair dryers, clocks, wall decorations, bathroom mirror. etc.

Step 6: Identify magnetic sensor position in your phone:  For iPhones, magnetic sensor should be at top left corner of your iPhone. For android, it can either be on top left corner or at top right corner depending on manufacturer of your device.

Best way to identify magnetic sensor position is to have other mobile camera and move around the app. When you see spikes in numbers or app starts beeping then that would be the sensor position for your android device.

You should perform step no 6 in advance before you actually start using the app and it is one time activity.

Step 7: Now whenever you visit unknown place, move app closer to your suspect (around few cm’s or inches) and check if it causes any spike in magnetic readings (or if app starts beeping).

See below image to identify the suspect in any common place


Step 8: If app is beeping then check for lens over that object. If object itself is electronic device like television, it could be a false signal. Sometimes electronic influence from electric wiring inside walls can interfere with the app providing false signal so always be thoughtful before making any decision. The best way to confirm is to check for lens over those suspects.


App receives data from magnetic sensor of your phone in raw format. This data is magnetic signal from nearby objects. This is the same sensor which is used by compass app to find north direction based on earth’s magnetism. After getting data from magnetic sensor, app removes unnecessary noise and earth’s magnetic noise and convert the magnetic signal into meaningful number. Then app analyze the magnetic activity and try to decide if that matches with magnetic activity from typical camera units. If it does, app will beep with respective message on the screen.

App will only beep if magnetic activity matches with the magnetic activity from typical camera units. Sometimes it can also be a false signal depending on magnetic influence caused by other electronic devices or even electric wiring inside walls.  In that case we recommend users to inspect lens over that object. If you are unable to find lens over the suspect or object itself is electronic device then you can ignore this message considering as false signal.

No. App can only sense magnetic activity from objects nearby 1-2 inches. You need to first identify potential objects and then scan those objects using the app.

Unfortunately, app needs magnetic sensor to work. You need to try app on different device that has magnetic sensor. Almost all recent devices have magnetic sensor but that totally depends on the manufacturer of your device. Like Uber app needs GPS on your device to work, this app needs magnetic sensor on your device.

If you need to scan objects which are installed on roof,  It is difficult but there are few ways like you can use selfi stick and use ladder.

Technically this is not possible yet because magnetic sensors on mobile devices are not highly sensitive or designed for this purpose. More the distance, magnetic activity gets reduced to zero and almost impossible to detect.

It all depends on type of camera, circuit boards and power supply units used for the camera. App do not detect lens but electronic hardware of that camera. For laptop camera, only lens are at top center but all camera units are embedded in the mother board. hence it is difficult to detect such cameras.

Since there are lot of factors influencing performance of the app, it is difficult to measure accuracy of the app. User intervention and common sense is required and user is expected to use this tool to support your decision and not to make a decision.

Open the app, select “Detect Wired Camera” option and rotate your phone in horizontal 8 direction. That should reset and stabilize the numbers. To confirm, open compass app and make sure compass app is pointing to the correct north. Watch this 9 second video on how to do that.

Write down your comments below if you more questions.

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10 Responses

    1. If you move app close, it causes spike and when you move app away, numbers go down, then there is definitely some magnetic activity however these numbers are very low for a camera. So chance of having hidden camera in your suspicious object is very low.

  1. Hi . This number is always more than 40 for me, but away from electronic devices, does this mean that someone hacked my phone?

  2. I’m spiking in the 200s I’m one spot very specific angle. It beeps and spikes and when I move away it stops . The area I can’t find where something would be though, would metal trim on a desk or a computer monitor cause it?

    1. Yes, these numbers are too high for any standard wired camera. Let’s see number may go beyond 1000 if you move near refrigerator because it has very high magnetism. That’s why app is helpful.

  3. Hello
    I’m on same spot/area and spikes to 200’s. Is this a camera?
    When I move away from spot, numbers drop. I’ve looked over area, which is corner walls with door frame and light switch.
    Not sure if I should be investigating this area serious or not?

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