This tool was born out of a desire for an easy way to let kids know if it was an acceptable time to get up on Christmas morning, but it could be used for any situation requiring a simple Yes / No!
Note: the time check occurs once every 24 hour period, so if at 22:15pm you set the Wakeup time to be 07:00 then at first it will show "Yes!" as technically it is after 07:00 that day, but once the time moves onto 00:00 or later then 07:00 will be in the future so it will go back to saying "No! Go back to bed!".
I hope that makes sense!