Diethard Seiferth releases Reminder4U 1.1, his new iMessage app available exclusively for iPhone and iPad. With Reminder4U, you can send someone a new or predefined reminder message or task with date and optional note that the recipient can add with one tap to the reminders on their device. The recipient can change the reminder date and the optional note and can send back this info to the sender. This all can be done directly in iMessage without leaving it. Reminder4U 1.1 is $0.99 and can be downloaded from iTunes.