How do I change the default alarm?

The alarm tone needs to be set separately and the default cannot be changed permanently. Each alarm is set at Sunrise (that doesn't really wake anyone up, not even my birds tbh) by default and hasn't even changed with 10.3.1.1016 (may change in the official OS).

I use Alarm+ as a default alarm app (I know it's not an ideal solution) but it's really good and has better alarm tones.

Con for Alarm+:
The tones need to changed manually for each alarm in Alarm+ as well.

Pros:
UI is loads better than the default alarm app
The default tone is loud and good
It has many colour themes (not that it matters to most)

Edit: it's a paid app

Q5SQR100-2/10.3.1.1016