Recently, I asked this question requesting recommendations for an Android alarm clock that does not turn on the screen when it rings on Software Recommendations StackExchange.

The reason I do not want the screen to come on while the alarm is ringing is because I want to reduce battery drain while the alarm is ringing.

I have yet to receive any responses, and I'm still searching for such an app. That got me wondering: Is it even possible for an Android alarm clock app to not turn on the screen when it rings?

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    Definitely possible the app decides if just a tune is played or other actions are taken. My favorite Teatimer works this way. You may need to change some config settings. – Robert Apr 13 at 7:10
  • @Robert Thanks Robert. I'm looking at Teatimer now to see if it can also work as an alarm clock. How can one tell if it is actually leaving the screen off vs. displaying all black pixels? – RockPaperLz- Mask it or Casket Apr 13 at 7:14
  • @Robert I might have figured out a method to determine if the screen is just filled with black pixels or is actually in standby (which I'm not sure if that's the same as screen off... do you know?). Many Android devices have an LED that will illuminate when the device is charging and is in standby. From what I can tell, that LED is not illuminated when the device is charging and not in standby. So that LED may be a good indicator. I'm not sure if this technique works in all cases though. – RockPaperLz- Mask it or Casket Apr 13 at 7:28
  • @Robert I tested the Teatimer app you recommended, and the LED I mentioned stays illuminated when the timer sounds, so if my test is accurate, then it looks like the screen is truly off. (Curious if you know of another test.) – RockPaperLz- Mask it or Casket Apr 13 at 7:34
  • Are you talking about the notification LED? That LED is just an LED without any connection to the screen. It can be addressed by any app if I remember correctly via the notification system. In any way you can also disable blinking in timer settings. – Robert Apr 13 at 7:54

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