Light meter - Easy to use, quick Lux measurement in your pocket.

With latest iOS 8.0 (iPhone) features and technology, this app works great with high precision in most conditions and you could save on purchasing of professional illuminometers which cost hundreds of dollars.

- Unique and attractive design.
- Exclusive simplicity and convenience of use .
- Lighting fast measurements.
- Lux measurement (aka lumen, luminance, luminosity).

Tips to use:
Open the app start the lux measurement with rear(back) camera, tap the screen show the current lux measure result. Tap the screen will continuous the realtime measurement.

This app is for your personal purpose only. It can NOT replace the professional Lux device.

What’s New

Version 2.0

This app has been updated by Apple to use the latest Apple signing certificate.

-Bug fix

Ratings and Reviews

2.8 out of 5
28 Ratings

28 Ratings

Cleveland 1967 ,

OK, but not great

It does measure light in lux (which can be converted to candlefeet by multiplying lux x .092), however there are a few negatives:
-the pop-up ads are very annoying
-there are no instructions regarding all the aperture settings and the implications for each when getting light measurements
-the screen seems to only operate in portrait mode; not in landscape


Finally a simple Lx meter that works

I've downloaded every free light meter there is and this is the ONLY one that does what it promises. Just wanted to compare the brightness of a room depending on what lamp was on, didn't need Hollywood movie production quality., just consistent readings. This delivered. The UI could use some help though, so I couldn't give it 5 stars.

I'd still like a simple light meter that was designed without assuming it was for photography at all, which they all seem to. Just something so basic that also measured sound (db meter). If any developers out there are interested in co-developing with a very senior UX design professional, let me know!


Still delivering

Update: I ran through everything that claims to measure light in any capacity and this still takes 1st place as far as working as advertised, and doing so consistently. Also like to see regular iodate exact bug fixes. It's a great tool. And it's free. The negative reviews are either a result of pilot error or bitter competitor.


Tu Anh Do
8.8 MB

Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Danish, French, Simplified Chinese, Spanish, Traditional Chinese

Age Rating


  • Family Sharing

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

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