Minimal Open Source Flashlight is an android open source flashlight application. This application is only support in android, you can see full description here and GitHub repository here
My suggestion is add more features for this application there is can turn on SOS Code in this application with condition if the flashlight is on, we can turn on/off the SOS code and if the flashlight is off we cant turn on the SOS code or the SOS button is disble.
Before add the features :
On and Off condition
After add the features and Interface :
When the flashlight button is off, SOS Code is disable
When turn on the Flashlight SOS Code is Enable, we can turn on/off the SOS code.
With adding SOS Code and many interface in this application is very useful because we can turn on the SOS light when in emergency situation and if this application only just for turn on/off the flashlight I think this application can't be usefull because almost all of smartphone provide flashlight. I also add more interface to make the application good to look.