Do you use any Android app that has very fast reminder input?
E.g. type 11.30am 03/01 blah blah blah and it will ring you at 11:30 with a 'blah blah blah' note?
Have you tried the native Google Calendar app and its reminder feature? Bring up the calendar, press the + button and you should be presented with several options: Goal, Reminder, Task, and Event.Fast entry Android reminders
Choose Reminder, fill out the fields, and save it. Fast entry Android reminders