Really helpful for photography. Using this app I can record the value or temp of natural light coming in from a window. I can then use the same app to help calibrate my led lights and match the window light falling on my subject. Super helpful at weddings.

Seems fairly accurate. Although I don't have another meter to compare it to, the app was able to confirm some 4000K LEDs. There's also an extra meter in tandem that senses magenta/green hue. Easy to use too, just grab a piece of paper, point and read data.

BUENÍSIMA APLICACION

Fantastic app! When I just compared the color temperature of one lamp to another because they looked the same to me, even though one is rated at 4000K and the other at 3000, this confirmed that I'm not nuts. (Especially because aside from these two, I also measured one that's rated at 5000K.) It'll obviously probably be off a bit because of the slightly different tints of white surfaces - wall paint, paper, etc. but given a lamp with a reliable color temperature as reference, it's all good.

Its a grate tool to have to get your white balance close as an expensive meter. I use a Sony a6000. It has made my shot better and cleaner.

Works perfectly. Completely accurate! Very useful app.

Works sufficiently accurate Lamps with 5600k are displayed with 5500k, 3400k LED with 3300k.

I just bought this and took photos using my Sony A35 with Minolta 50mm f2.8 prime lens comparing it to the Auto function and various other settings. Used f stop of 4 for all comparison photo's and then shutter speed to match f stop. Tried it out first just analyzing the subject. The color temperature was definitely off when compared to Auto. Second series I followed the instructions by taking a picture of white paper placed in front of the object first to analyze. The difference is between night and day. The photos I took using the Color temp settings looked like I had used fill flash. The colors were more true than using the Auto feature. It also brought out more detail than the auto function. I would recommend this App, but if you plan to rely on it I would make sure you always carry a white piece of paper with you.

I tested this application against several known color temperature sources and it reported the color temperature/Kelvin within a very small variance to the expected number. Nexus 5 running stock Android 6.0.0 rooted it was consistently within +/-100K. Nexus 7 stock Android 6.0.0 rooted it was less accurate varying by +/-200K. Samsung S5 Android 5.1 consistent within +/-200K. Surprise results on Amazon Fire Phone FireOS 4.6.3 rooted varying +/-100K.

UPDATE: The developer has made an effort to fix a start bug (error) promptly! There was less than 1 week between the first installation and the bug fix. Nice contact, the app still has to be tested extensively by me. At least it starts now, thanks to the developer! There are 3 stars on top for that. If the app convinces me, I'll give it full stars. We'll see.

App does not start!