# Hidden Devices Detector

Android app · by ToolsZone · Tools

Hidden Devices Detector has 79,777 installs, rated 4.5 from 449 ratings, \#20,042 of 247,188 in Tools.

## Figures

- Installs: 79,777
- Rating: 4.5 · 449 ratings
- Price: Free
- In-app purchases: no
- 7-day growth in installs: +69 (+0.1%) (+171 over 17.5 days)
- Rank: #213,731 of 2,983,035 Android listings with an install count (down 11,194 since 2026-11-01)
- Rank: #20,042 of 247,188 in Tools

## Is Hidden Devices Detector safe?

StoreTally doesn't rate safety. Here's what the store and our tracking show:

- Listed on Google Play.
- Made by ToolsZone; developer website listed: hiddendevicestz.blogspot.com.
- On Google Play since 2020-06-11. Last updated 2026-07-17.
- Rated 4.5 from 449 ratings.

## Reviews

- Ratings by stars: 5★ 85% · 4★ 2% · 3★ 5% · 2★ 0% · 1★ 9% (442 ratings)

## Description

Use Hidden Devices Detector to measure nearby magnetic-field changes with your phone’s built-in magnetometer.  
  
Hidden devices detector app provides a graph, meter, and digital views so you can observe magnetic-field strength in microtesla (µT). It also includes Sensor Check, adjustable alerts, scan summaries, and a manual Room Checklist for visual inspection.  
  
Hidden Devices Detector is designed as a magnetic-field measurement and inspection aid. It does not confirm that a hidden camera, microphone, GPS tracker, surveillance device, or any other specific object is present.  
  
📈 Live magnetic-field graph  
  
View magnetometer readings on a real-time graph while moving your phone around an area.  
  
The graph helps you observe:  
  
• Changes in magnetic-field strength  
• Sudden increases or decreases  
• Current magnetic-field level  
• Peak reading during the scan  
• Active scan duration  
  
When the scan is complete, tap Finish Scan to view the duration and peak magnetic-field reading.  
  
📟 Magnetic field meter  
  
Use the meter view for a simple visual representation of nearby magnetic-field changes.  
  
The meter displays:  
• Total magnetic-field strength in µT  
• X-axis reading  
• Y-axis reading  
• Z-axis reading  
• Magnetic-field level status  
  
Devices detector app uses wording such as elevated, high, or very high magnetic field. These levels describe the sensor reading and do not mean that a particular device has been detected.  
  
🔢 Digital magnetometer readings  
Use the digital view to check live numerical sensor values.  
The digital screen shows the total magnetic-field strength together with individual X, Y, and Z magnetometer readings.  
  
✅ Sensor Check  
Check whether your Android device includes a magnetometer before using the detector tools.  
  
Sensor Check can display:  
• Magnetometer availability  
• Sensor name  
• Sensor vendor  
• Live X, Y, and Z readings  
• Total magnetic-field strength  
• Sensor accuracy status  
• Figure-eight calibration instructions  
  
Devices without a magnetometer receive a clear unsupported-device message.  
  
📋 Room Checklist  
Use the manual Room Checklist to visually review common locations in:  
• Hotel rooms  
• Bedrooms  
• Offices  
• Changing rooms  
• Bathrooms  
• Vehicles  
  
Checklist locations may include clocks, chargers, electrical sockets, mirrors, air vents, televisions, lamps, shelves, smoke detectors, wall fixtures, and decorative objects.  
  
The Room Checklist is educational and does not guarantee that a hidden device will be found.  
  
🔔 Adjustable magnetic alerts  
Choose a Detection Threshold in Settings.  
When the measured magnetic-field strength exceeds the selected threshold, the app can provide sound and vibration feedback.  
  
You can also control:  
• Vibration Alert  
• Keep Screen On  
• Detection Threshold  
  
How magnetic-field readings work  
  
Hidden devices detector app readings may be affected by:  
• The Earth’s natural magnetic field  
• Phone orientation  
• Sensor calibration  
• Magnets  
• Speakers  
• Chargers  
• Laptops  
• Electrical equipment  
• Metal objects  
• Nearby device hardware  
  
Readings can vary between phones because Android devices use different sensor hardware and calibration methods.  
  
A higher reading near a laptop, speaker, charger, magnet, or electrical component may indicate a stronger local magnetic field. It does not prove that a hidden or surveillance device is present.  
  
Important limitation  
Hidden Devices Detector does not use the camera, microphone, location, or storage to perform scans.  
  
Hidden devices detector app does not detect radiation, radio-frequency transmissions, gold, silver, GPS trackers, microphones, or hidden cameras as specific objects.  
  
Use this app together with careful visual inspection. For serious privacy or security concerns, consider contacting a qualified security professional.

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Source: https://storetally.com/android/com.toolszone.hiddendevicesdetector  
As of 2026-11-15, from the StoreTally census.