Many of us use alarm clocks to help us wake up on time. Your annoying clock could bother your partner though. The Lark Silent Alarm Clock takes a different approach. It has a wristband that vibrates to wake you up. It works even if your phone dies for some reason. You also get an audio backup alarm to wake you up if the wristband dies. The wrist sensor picks up patterns as you sleep to tell you how long and well you sleep each night. You can track your sleep patterns using the companion mobile app. If you need sleep coaching, you could always sign up for Lark Pro. Sets you back $69.99 at the time of this writing.