I really like the functionality of the Galarm android app but I can't help but feel like it's something I should be able to self host instead or pay a monthly subscription for.

To elaborate, Galarm is an alarm app with the key feature of being able to send alarms to other people you "connect" with. For me, this means my wife can send me an alarm to do something at a certain time instead of sending me a message about what I need to do and when and then I have to go and set up the alarm myself. Also, I want to emphasize alarm here. Something that just sends notifications is basically worthless to me.

Anyone know of something I could host to get the same functionality?