OnTimeAlarm is a free lifestyle app developed by GreatDragon.Kim that serves as a reliable alarm for Android users. The app is designed to play a designated alarm, MP3, or speak memo at every hour on time. Users can also customize the alarm to sound every 50, 45, 40, or 30 minutes.

OnTimeAlarm displays the date and day of the week in the status bar, speaks memo, supports the reservation and execution of table clock, battery alert, and today's fortune. The app requires access to the phone's file and phone permissions to set music as an alarm sound and prevent the alarm sound from executing when a call is being received or busy.

It is important to note that users need to exclude OnTimeAlarm from the manufacturer's own power-saving features and set the app to "run normally, except battery optimization" to ensure proper functionality. OnTimeAlarm supports Samsung/LG phone Android 11 and Xiaomi Phone. It has been tested on several smartphones, including Samsung S10+, LG V50, and Xiaomi Redmi Note 7.

Overall, OnTimeAlarm is an excellent alarm app that is easy to use and reliable. It is perfect for individuals who need to keep a strict schedule throughout the day.