I’ve enjoyed using the Simple Alarm Clock on F-droid, importantly for me, it requires you to hold down the shut off button for a couple seconds which helps prevent me from accidentally shutting off my alarm instead of snoozing it. Only downside for this app and possibly others is that they may not function if your device OS updates in the middle of the night.
sent from my Xcover6 Pro.
Replaced my xcover, which replaced my lg g5. Wish it got more love in the foss OS department. Love all the hardware features but dont love samsung. First party support for a phone like this though is a benefit