Motorola Q9m / Q9c

I have a Windows Mobile Moto Q9C and am looking for software that will set off an alarm every 3 hours letting me stop and start it (Friday afternoon to Sunday/Monday typically). Its going to wake me up so I need to be able to turn it off and it go off 3 hours later without a reset (in case I’m groggy).

I want to set a start date/time and end date/time and have it go off every 3 hours. Thanks.