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Flir One

Flir One

Thermal Camera for Smartphones

7.6K ratings
373 reviews
📷 Photo & Video
Free
In-App Purchases

Details

  • Released
  • Updated
  • August 4, 2014
  • September 2, 2026

Features

Developer

FLIR Systems Aktiebolag
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Flir One screenshot #1 for iPhone
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About

This app transforms your smartphone into a thermal imaging device when connected to a compatible camera. It helps identify hidden issues like water damage, electrical faults, and HVAC problems with advanced visual enhancements and measurement tools. Document and share your findings easily.

✓Thermal camera view
✓Capture photos and videos
✓Temperature spot measurements
✓Color palette selection
✓Add text notes
✓Cloud upload and organization
✓Inspection guides
Show original description

What users say

Summarized from real user reviews of Flir One. Based on 7.6K reviews and a 4.6/5 average, it highlights the 7 positives and 9 negatives reviewers mention most about this Photo & Video app.

Positive things

  • 🚀Great for finding animals
  • 🚀Excellent affordable option for home inspection
  • 🚀Valued piece of tech for animal rescue
  • 🚀Excellent piece of equipment
  • 🚀Simple but informative
  • 🚀Works great as advertised & very user friendly
  • 🚀Awesome system saves time and money

Negative things

  • 🐛Image alignment issues
  • 🐛Scam - won't connect
  • 🐛Poor App/Image refresh
  • 🐛Waste of money
  • 🐛Poor UX, only real option
  • 🔋Poor battery life
  • 🔒Privacy issue
  • 🔒Requires full access to photos
  • 🔒Watermark advertising
See all reviews

What's New in Flir One

6.4.13

September 2, 2026

Bugs fixes and improvements.

Subscription plans

Inspection Guides

Inspection Guides (1 Year)

$29.991 Year
1 Year trial
How to cancel Flir One subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Watermark covers image

Which makes this wholy unsuited to professional use
adam_australiaadam_australia

Firmware update broke my unit

Performed the latest firmware update and now my unit won’t connect to my wifi. I’ve reset the unit, deleted and redownloaded the app, reset my iPhone 100x. Nothing is fixing the issue. Thank you for the frustration with the amazing update!
Tanner102892Tanner102892

Thermalsicht öffnet sich nicht

Ich habe mein Gerät bislang ohne Probleme andocken können, seit einem der letzten Updates schaltet die Anzeige nach dem Andockvorgang aber nicht mehr um auf die Thermalansicht. Schade, so wird das Gerät unbrauchbar.
Ame IseAme Ise

Response from developer

Es tut uns leid, dass die App nicht ordnungsgemäß funktioniert, und wir danken Ihnen für Ihr Feedback. Um der Sache nachzugehen, benötigen wir weitere Informationen. Bitte rufen Sie uns unter der Nummer (+1) 805 392 3775 (Option 1) an und/oder melden Sie das Problem unter http://flir.custhelp.com/app/ask mit Angabe Ihres Geräts. Ein Mitarbeiter wird sich dann mit Ihnen in Verbindung setzen.

Doesn’t work on iPhone

Tried to connect Flir to my phone but failing, no proper documentation that can help me figuring out. It couldn’t detect the camera. Works fine with another phone (Pixel).
DeslynaDeslyna

App does not work on iphone 17 pro max.

I plugged in my flir one after fully charging it, held the power button and then waited for it to start flashing green, and it just sat on the stupid screen telling me how to connect. Tried fully uninstalling and reinstalling the app and the same problem. The camera worked fine on my android, so I can only assume it's ios being garbage. Putting 1 star for now, if an update is put out fixing it I'll give a 5 star which is what it would be if it connected.
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TheFrostiestJackTheFrostiestJack
See 368 more reviews

Developer apps

FLIR Tools
FLIR Tools

by FLIR Systems Aktiebolag

📷 Photo & Video

(19)

Free
Flir Responder
Flir Responder

by FLIR Systems Aktiebolag

📷 Photo & Video

(6)

Free
See developer apps

User experience

🐞

Reported Bugs

7 issues

Constantly disconnecting

Bug

App crashes

Bug

Doesn't work with older devices after updates

Bug

Slow refresh rate and high latency

Bug

App requires full photo library access

Bug

Freezes and paralyzes phone

Bug

Crashes on startup

Bug
✨

Requested Features

6 requests

Bring back swiping between thermal and regular images

Feature

Allow locking temperature scale

Feature

Add temperature range display

Feature

Allow setting own emissivity value

Feature

Allow selecting colors on manual temperature scale

Feature

Improve camera alignment adjustability

Feature

FAQ

What does the FLIR ONE app do?

The FLIR ONE app works with a connected FLIR ONE series thermal camera to turn your smartphone into a thermal imager. It allows you to see heat signatures, capture thermal photos and videos, and analyze temperature data to identify problems like water leaks, electrical issues, or HVAC inefficiencies.

What are the key features of the FLIR ONE app?

Key features include a live thermal camera view, the ability to capture and save photos/videos, temperature spot measurements, adjustable color palettes, and the option to add text notes. Advanced models offer automatic hot/cold spot tracking and IR scale adjustment. The app also supports cloud uploads for easy sharing and organization.

Is the FLIR ONE app free to use?

The app itself is free to download and explore. However, to utilize the full thermal imaging capabilities, you need to connect a compatible FLIR ONE series thermal camera. Some advanced features, such as the FLIR ONE Inspection Guides, are available as paid in-app purchases.

What devices is the FLIR ONE app compatible with?

The app is designed to connect with FLIR ONE series thermal cameras, which then attach to your smartphone. You can explore the app's features without the camera attached, but the thermal imaging functionality requires the physical camera accessory. Specific compatibility details for the camera models can be found on the FLIR website.

What are common use cases for the FLIR ONE app?

Common use cases include inspecting electrical panels for overheating components, diagnosing HVAC system failures, finding hidden water damage or insulation gaps in homes, and performing general building inspections. It's also useful for automotive diagnostics and identifying energy loss around windows and doors.