At the risk of resurrecting an old thread, I had a somewhat similar scenario today, but totally opposite results …

I rely on my Apple Watch as an alarm: the tapping always wakes me without being loud or obtrusive.

However I forgot to charge my watch, brought the cable to work, forgot to charge it at work, and forgot to bring the charging cable home. Point is, my watch battery is dead, so how did I get up on time this morning?

1. Apple integration for the win! My iPhone automatically took over the alarm. It was loud and obnoxious, but worked
2. My music came on. While I set the schedule through the SONOS app, I’m pretty sure it runs locally. While that relies on streaming music, I have in the past awakened to a shriek as a backup for when streaming doesn’t work

So, vendors that “just work”, devices with intelligent failure, multiple independent sources, local control.