If your device has a feature related to battery saving such as "Battery optimization" and it is turned on, please exclude Alarm Clock from the list.
If you are using applications for saving battery or memory, exclude Alarm Clock from the list or do not use the applications.
Leave your phone charged while you are sleeping.
2) Keep memory for Alarm Clock
⭐️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 Alarm Clock 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.)
4) Let Alarm Clock autostart
Move to [Settings > More settings > Permission management(Applications) > Autostart] and turn on Alarm Clock switch.
5) Let Alarm Clock appear on top
Please grant Alarm Clock the display permissions to use the app properly.
[App manager - Authority manager - Display on lock screen - enable for Alarm Clock]
