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 trial version and can be used free of charge for 3 days from the start.
First of all, please consider purchasing the paid version only if you like using the trial version.

Paid version/a>
https://play.google.com/store/apps/details?id=com.yystudio.iconlight2