What is Reddit's opinion of LedScope for color-blind?

From 3.5 billion Reddit comments

If you have trouble with LEDs (is this light blinking red, yellow or green?) there are smartphone apps that can help. There are also red and green filter lenses that you can keep on a keychain which can help you to identify colors.

I haven't used that one, but I do use these:

https://play.google.com/store/apps/details?id=com.mkrscope.ledscope_trial

https://play.google.com/store/apps/details?id=jp.gr.java_conf.geoteru.colorpicker

Coloured LEDs (and especially multi-colored LEDs) are the bane of my working life.

Fourunately, I found a few apps for my phone that help a lot.

Starting with:

LEDscope