No, the app is not doing any activities in the background. You can even close the app and it will reappear on wakeup time. Of course the wakeup by light in the morning will consume some battery. We recommend to plug in the charging cable overnight so you can leave the house with a fully charged device.
You may also like
Phone settings / Apps / Battery / Gentle Wakeup Background restrictions must not be applied Battery must be not optimized Phone settings / […]
The standard alarm starts 20 minutes before your wakeup time to increase the light. The sound will start at wakeup time with […]
This only happens when you create a test alarm in the near future like 10 minutes. The standard alarm has a 20 […]
No, Android has limitations for apps on external storage and highly recommends to keep alarm apps only on the internal storage. External […]