Crowdfunding for a Mobile Linux Sleep Tracker

Tbh the best case would an open source fitness tracking watch. After some research the two hardest things are pulseox(even garmin watches are kinda inaccurate on ox) and battery life. I think its possible but most open source watches aim at the budget sector while a real fitness tracker sadly needs to be pretty expensive. It would be pretty cool if you had a bunch of sensors and you could just do anything with them(make custom workouts, sleep tracking, etc). If you think about it a smartwatch om hardware level is basically a nunch of sensors and the software just takes data, processes it and then spits out new data thats easier to understand.