Candide Runner wrote:
You set two alarms every night? Weirdo.
No, I only set two alarms if I really, really want to be sure to wake up on time. For example, when I'm meeting buddies for an early morning run. When I'm catching an early morning flight. When I have an important job interview lined up.
The point is - you cannot really 100% trust any single device, phone, watch, alarm, or otherwise. Any single device can fail (power outage, iPhone software bug, battery, whatever). So use a backup device if you want assurances. It's pretty simple, really.