Open Reminder is a simple and free reminder app for Android phones and tablets.

Features:
* Two modes of operation: reminders triggered at certain time of day and reminders that repeat on a selected time interval
* Reminders can repeat on selected days of the week
* Time interval reminders can repeat within a selected time range during the day i.e. 9am to 5pm
* Notifications are generated when a reminder is triggered
* Reminders display countdown timers when active
* Completely free and no adware
* Open Source

Source Code: https://github.com/spanglerware/Open-Reminder
Bug reports/comments/suggestions: [email protected]