Pebble. There is brand new Pebble hardware coming soon, the Pebble Time 2. The hardware is well described, the watch firmware is open source @ https://github.c

Pebble. There is brand new Pebble hardware coming soon, the Pebble Time 2. The hardware is well described, the watch firmware is open source @ https://github.com/coredevices/PebbleOS https://github.com/coredevices/PebbleOS, the companion mobile app is also now open source @ https://github.com/coredevices/mobileapp https://github.com/coredevices/mobileapp. It works with GadgetBridge and microPebble. I've been using a Pebble since the original one, currently with a Pebble 2 Duo on my wrist and Pebble has yet to be dethroned for me.