As per Sion Kim  can't get it to show up on the locked black screen (am using A5.1)  which is the whole point of it......I would NO star if i could! I want it to work on the black sleep screen  few apps explain the difference between the locked notification scree and the black sleep screen. NOTE: IMO a notification screen isn't needed as it works well as it is! Will it work on the black sleep screen?