TimerAlarms cydia tweak allows you to create alarms using MobileTimer’s Timer interface.
Useful for when you want to create an alarm that will ring after a certain period of time. Perfect for a 30 minute nap!
(it will create an alarm, not start the timer. That way you can have snooze as well as other Alarm only options)
I haven’t tested it on 64bit devices, but it should work fine. Please report any bugs!