Shabbat Alarm was designed to help observant soldiers set a single preset alarm in order to help wakeup on Shabbat and Holidays, in an orthodox manner.
An alarm can be repeated based on a user's preference but can never be interacted with while ringing.
The interval between multiple alarms can also be customized as can the actual alarm sound.
Daily prayer times are also displayed as an indicator as for when to pray.
Beyond the scope of Shabbat, this app may be used as a normal alarm clock.