There are many attempts to build custom smart watches. Many of them have nice characteristics, but lack the finished look. If you are going to wear it, then design and feel is very important factor. Max.K introduced his 3D printed watch version. His design called Chronio is an Arduino based custom built watch featuring Atmega328p microcontroller, Real time clock DS3231, 96×96 pixel Sharp Memory display and is powered by CR2025 160mAh battery.
The watch has overcome several revisions and already has a bunch of useful features that include efficient power saving that leads to 20uA power consumption, 3 button interface (no touch screen functionality), displays time, date, temperature and battery information on main screen. Other apps include stopwatch, experimental Flappy bird game. And additionally to that case fits standard 22mm watchbands, so you are free to choose the one that fits best for you. The inspiration to this project was Pebble Time watch which looks more advanced from inside, but appearance is similar. Chronio can’t beat Pebble Time in its features, but it seems that battery time is 6 times longer.