You wake up in the middle of the night. Is it time to get up? Well, you can look at the nightstand clock. Unless your partner is in the way. Whoops. Even then, without your glasses, the time is ...

Jamie Kripke designed an analog clock that he said won’t “scare you awake.” Instead, it plays one of seven melodies specifically composed to arouse you gently.

Analog vs digital watches: If you want the most exact time, a quartz-based or GPS-enabled digital watch may offer better precision.