If "Battery optimization" is turned on, exclude Alarmy from the list.
[System Settings > Apps > Special access > Battery optimization]
Please try not to use "Sleep standby optimization" and "Deep optimization" in "Advanced optimization"
[Settings > Battery > Battery optimization > 3 dots on the upper right corner > Advanced optimization]
Please try not to use features such as Battery Saver and Adaptive Battery provided on your device when you have upcoming alarms. They cause forced termination of the app.
Although you have set these options already, sometimes the system resets the options when your device is updated or rebooted. Please double-check them.
If you are using battery or memory-saving applications, please exclude Alarmy from the list or do not use the applications.
Leave your phone charged while you are sleeping.
2) Keep memory for Alarmy
⭐️Please clear your recent app list on the phone. (However, please note that alarms may not ring after executing the memory freed up function.)
Do not use auto-reboot if you are using screen lock (e.g. password, pattern, and so on). Alarms cannot ring unless the screen is unlocked at least once after reboot.
3) Let Alarmy make sound
When you use “Do not disturb”, please allow alarms and media sounds. Otherwise, it will not ring. (Menu titles in Settings may vary by OS version, manufacturers, etc.)
