A free app for Android, by DimonVideo.

DVBeep TTS, the most convenient and easy-to-use way to get your daily information and reminders in a useful format. It's an app for everyone, no matter who you are or what you do. It will beep at you every day at the same time, and you can set up to five alarms. This way, you can be sure that you'll never miss a deadline.

You can also set up to five hourly reminders. If you want to be reminded every hour, just set up an hourly alert. Or if you have a very busy schedule, you can set up to five weekly reminders. They'll appear on your calendar every week, so you won't forget about them.

You can also set up to five daily messages.