TimeChime is a simple timekeeping app that can be set to play a sound on the quarter-hour, half-hour, or hour. You choose the interval that you want! Four sounds come with the app and you can select any one of them.
-The app does not have to be open or running in the background to notify you. Your device can even be locked. If your iPhone is locked, the notification will be sent to your Apple Watch, and you can stop further notifications from your Apple Watch.
-Huge buttons! No trying to tap on little buttons for those of us without great eyesight!
-The notification will give you the option to Continue or Stop future notifications or Open the app to change the time interval.