This $279 Phone Add-On Found Hidden Cameras and Water Leaks in My Home

Thermal imaging was once reserved for professionals with expensive equipment, but a new compact add-on called the Thermal Master P3 brings surprisingly advanced thermal capabilities to any smartphone for $279. The device plugs into both iPhones and Android phones, sets up in just a couple of minutes, and comes with a secure carrying case for travel.

In my tests, the Thermal Master P3 proved highly effective at detecting hidden cameras — the kind that have been found in vacation rentals — as well as spotting insulation issues and identifying certain types of water leaks. The module builds detailed heat maps and provides pinpoint temperature measurement. It also allows zooming in and isolating specific areas for more focused analysis, making it a versatile tool for home inspections and travel safety.

At roughly $300, the device costs less than most professional home inspections, and it can be reused across different seasons, on multiple trips, and for various purposes. The build quality is excellent, and the setup process took only a couple of minutes. The device offers a wide range of customization options, including a dedicated birdwatching mode.

However, the Thermal Master P3 has its drawbacks. It is relatively expensive for a consumer gadget, and it struggles with accuracy near reflective, metallic surfaces. Despite these limitations, the device provides a practical and portable way for anyone to access thermal imaging technology that was once out of reach.