There used to be some application named vigilante that had alert when microphone or camera was activated. Then it's dev stopped updating it and that was that.

I know android should show some small icon when camera or mic is active, but that doesnt help me if i'm not actively looking at the screen at the time.

Do you know of anything that could still do what vigilante did? I'd prefer to know if something was trying to be sneaky. Or is it pointless even trying to do that due to something?