Don't like today's smartwatches? Just build your own - The Verge
Cheap Smartwatch Hacking, To Run Your Own Code | Hackaday
This DIY Smartwatch Gives Users Nearly Full Control - Hackster.io
Amazon.com: Smart Watch (Answer/Make Call), 1.7" Smartwatch Fitness Tracker for Android and iOS Phones with Heart Rate Sleep Tracking, 28 Sport Modes, Blood Oxygen, Ai Voice Control,Fitness Watch for Women Men :