If you need to stay on top of things, Pebble can help with vibrating notifications, messages and alerts. Dismiss a notification with a shake of your wrist. Pebble is the first watch built for the 21st century. It's infinitely customizable, with beautiful downloadable watchfaces and useful internet-connected apps. Pebble connects to iPhone and Android smartphones using Bluetooth, alerting you with a silent vibration to incoming calls, emails and messages.