A fully custom open source Smartwatch with all the features you are used in normal smartwatches
Disclaimer I haven’t worked on this in ages. I never got to get all Parts working together. I would not suggest building it on your own at the moment. If you want to contribute feel free to do so.
Project Airframe is an open-source smartwatch designed to give developers and hobbyists full access to both hardware and software. With state-of-the-art sensors, wireless charging, GPS, and more, it’s a versatile tool for exploring wearable technology. Below, you’ll find everything you need to get started, from hardware specifications to software instructions.