This app is a convenient app that turns the camera light on and off just by tapping the icon.
Since the operation screen (activity) does not open when you tap the icon, it is very lightweight and operates quickly.
This is a paid version and can be used without restrictions.
First of all, please consider purchasing only those who like using the trial version.

Trial version
https://play.google.com/store/apps/details?id=com.yystudio.iconlight