$1.99

Details

Released
November 4, 2011
Updated
June 2, 2026

Features

Thermal Light screenshot #1 for iPhone
Thermal Light screenshot #2 for iPhone
Thermal Light screenshot #3 for iPhone
Thermal Light screenshot #4 for iPhone
Thermal Light screenshot #5 for iPhone
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About

This app measures the temperature of extremely hot objects by analyzing the light they emit. It's designed for users working with materials like iron, steel, and copper, offering a cost-effective alternative to specialized thermometers.

✓Measures temperatures from 1000F to 2700F
✓Uses black body radiation analysis
✓Calibrated against certified IR thermometer
✓Cost-effective alternative to IR thermometers
✓Supports iron, steel, and ceramics
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What's New in Thermal Light

1.220

June 2, 2026

updated for latest iOS

User reviews

Trash

Trash app can’t use it unless it’s dark I can’t even use it

Nice, any opportunity for a SI metric version?

Nice app, seems to work fine. It would be nice to have a metric version showing celsius or Kelvin instead of Fahrenheit.

Dead app please update

I love this app and have used it for years to double check my heat treat oven calibration

It is no longer compatible with iPhone OS and does not work at all now

If they ever update I’ll change my review to 4 stars

Refund please

The app won’t even open the camera to calibrate

Hard to calibrate

I found the app very hard to calibrate and it needs to be calibrated before every use. Even if the phone goes into standby it needs recalibration. Effectively making this app useless

Developer apps

FAQ

What is the temperature range for Thermal Light?

Thermal Light can measure temperatures between 1000F and 2700F. The temperature increments are 50F.

How accurate is Thermal Light?

The app has been calibrated against a certified IR thermometer to ensure accuracy in its temperature readings.

What materials can Thermal Light measure the temperature of?

Thermal Light is designed to measure the black body radiation of materials such as iron, steel, and ceramics.

Is Thermal Light suitable for professional use?

Yes, it is great for knowing the temperature of steel for working, offering a more affordable solution than traditional thermometers.

What devices does Thermal Light support?

Thermal Light is supported on iPhone and iPod devices.

How much does Thermal Light cost?

Thermal Light is a paid application, priced at $1.99.

When was Thermal Light last updated?

The latest version of Thermal Light was last updated on January 18, 2021.

Does Thermal Light have ads?

No, Thermal Light does not contain advertisements.