But still, I installed "Flashlight HD LED" - one of many flashlight apps. Just because it was in the top free of google play.
Later I found that I used this app much more often that I expected. So, it was really a tool app for me.
Flashlight is great app, but I believe the interface could be simpler. And it shows ads what I do not like (yes, there is also a pro version).
So, the winner is... "TeslaLED", sorry "Flashlight HD LED" you are uninstalled.
Probably, somewhere in the Play store there is better flashlight app, but I do not care - TeslaLED does what I do need the way I like.