How do you know what app is using your Led

[Android Central Question]

Cause it won't let me use my flashlight

 

[ManiacJoe]

Assuming you are talking about the LED flash associated with the camera, since it is associated with the camera, any app trying to use the camera will block other apps from using the flash.

Is your flashlight app the one that came with the phone or a third-party app from the Play Store?