Light meter in your pocket!

The only app you really need to measure light intensity. Calibrated with professional Illuminometer.

- Realtime measurements
- One-time measurement
- Average and Max values
- Indoor and outdoor modes
- Front and rear cam
- Lux and Foot candle measurements

Please note that Light Meter app is not a replacement for a professional device and should be used for private purposes only.

Have any questions or suggestions? Write to us:

What’s New

Version 1.1

- fixed bug with max and average value reset

Ratings and Reviews

3.6 out of 5
82 Ratings

82 Ratings

syclemorphyn4009 ,

Really like it

It is an interesting and useful app that can measure the light. In some situations, we need to know about the light intensity, but with no professional devices. with the app, we can finish it using mobile phone

Gentle Explorer ,

No customer service. Indoors vs outdoors odd. No color temperature.

Do not expect customer service to ever answer any questions or emails.

Light levels are absolute levels of brightness. Therefore, it's very odd that there is an indoor/outdoor button to set. The two settings get very different readings. Why? It should not matter whether the reading is indoors or outdoors. The number is simply a function of how bright it is.

Other apps on the App Store will also tell you what the color temperature of the light is. That can be very useful in knowing whether it's bluish or yellow-ish. This app does not give you that.

Developer Response ,


thank you for using Light Meter and sorry for inconvenience. The app is using Neural Networks to measure light levels. Since we don't have access to the light sensor directly we have to approximate measurements from camera readings. And you're right i'm using brightness level to measure but not only. Exposure time. F-number and other readings. While calibrating i noticed that my neural network shows better results if I split measurement modes into indoor/outdoor. It helped me to improve precision. At the moment sum squared error is about 9% on 5000+ calibration samples. I bet it's the best result on App Store. And thank you for a nice idea. I'll add color temperature measurement mode with upcoming update.

DhSrMac683 ,

Light meter very good

I spent over 60 years in electro optical engineering, and this is by far the best two dollars I ever spent. I agree the color temperature would be a big plus, and to be able to see the image would be very helpful to get things pointed the right way.


Marina Polyanskaya
25.1 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, French, German, Italian, Russian, Spanish

Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like