This app together with a FLIR ONE® hardware device turns your iPhone into a thermal camera.

Note: This app requires the FLIR ONE hardware device to stream thermal images, but feel free to explore the app without it. For more information on the FLIR ONE, visit

The FLIR ONE thermal camera gives you the power to identify heat sources that are invisible to the naked eye. Whether you need to inspect electrical panels, find the source of HVAC failures, or discover hidden water damage, FLIR ONE Pro cameras offer the outstanding thermal resolution you need to help you finish the job fast. Identify problems quickly, ensure you repaired them correctly and demonstrate that they have been repaired. Enhanced resolution, enabled through VividIRTM, and features such as temperature measurement tools, level/span controls, and high temperature range (up to 400°C for the FLIR ONE Pro) make troubleshooting easier and more accurate.

All FLIR ONE models include advanced image processing through FLIR MSX® technology, which adds finer details and perspective to images. The revolutionary OneFit™ adjustable-height connector ensures that your FLIR ONE device will fit your phone or tablet, even when it’s in a compatible protective case.

The FLIR ONE App provides a simple user interface with a variety of functions for operating your FLIR ONE device. Add spot measurements, change color palettes, and adjust live settings using the App tools. Capture your thermal images and videos, and share them with customers, friends or social media.

Connect with the FLIR ONE at,,, and

What’s New

Version 3.2.8

- Stability improvements
- Improved language translations

Ratings and Reviews

2.1 out of 5
34 Ratings

34 Ratings

Bunglin ,

Good hardware - let down by app

The hardware is pretty good - but its usefulness is let down by the app.

I have had the flir-one for a couple of years now and have seen no significant update to the app.

The app is still missing some very basic functionality, like letting you set the temperature scale manually. This limits the usefulness of the flir-one. Sometimes you may only be interested in highlighting areas that are above a certain temperature. You can lock the scale - but it only locks to the temperature range of whatever is in front of the camera at the time which is pretty arbitrary.

The ability to manually edit the colour gradients is also missing and the inbuilt ones aren't nearly as comprehensive as those available in other apps.

I would be tempted to buy the pro-version, but not until there are some improvements in the app.

Developer Response ,

Thanks for your feedback, we've added the ability to lock span in the latest version of the application.

heattracer1 ,


The app seems to crash when checking for updates ?
A update to the app would be nice ! I wonder if it will work on iOS 13 ?

StevenTyson ,

Both SW and HW issues :(

The app itself does the basics of what is required but with little finesse.
Screen rotation (for instance to put the FLIR One at the top of your phone so it’s not blocked by your hand!) doesn’t work properly and some text doesn’t rotate, the menu text titles overlap each other etc.
And to make matters worse - my FLIR One Pro simply will not charge to 100% even overnight. When purchased it was at 91% but now (after less than a week) it won’t go higher than 82%?! I’m using the supplied Type-C cable and an iPhone charger (1A/5V) :(

I really wish this had worked out better.


FLIR Systems INC
72 MB

Requires iOS 11.4 and watchOS 3.1 or later. Compatible with iPhone, iPad and iPod touch.


English, Czech, Danish, Dutch, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Swedish, Traditional Chinese, Turkish

Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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