Light Meter - lux and foot candle measurement tool 4+

Marina Polyanskaya

Designed for iPad

    • 3.8 • 115 Ratings
    • $1.99



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

This app has been updated by Apple to display the Apple Watch app icon.

- fixed bug with max and average value reset

Ratings and Reviews

3.8 out of 5
115 Ratings

115 Ratings

eatmyduce ,

Make sure you use the best camera on your phone.

My I phone has a front and back side camera. I have a screen protector on the face that affects the readings. I make sure I use the back side camera for most accurate results with this app. Can’t speak to accuracy compared to a standard. This app works great for my needs.

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.

App Privacy

The developer, Marina Polyanskaya, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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