In case by "competitor", you're referring to Ultrahuman, I disagree that they're a competitor. Ultrahuman provides an overwhelming amount of information and a

In case by "competitor", you're referring to Ultrahuman, I disagree that they're a competitor. Ultrahuman provides an overwhelming amount of information and a lot of useful-seeming recommendations on top of it but in my experience, the data collected by Ultrahuman are inaccurate to the point of being useless. For example I can be exercising with an ECG chest strap recording a heart rate of 170bpm and the Ultrahuman ring will consistently report 90bpm. I haven't tried Oura personally (hard to get it in my region) but they do have a decent quantity of well-run studies to validate their measurements. Ultrahuman has close to zero validation. They do have their metabolic score feature that has some amount of proper validation but it's essentially a nicer UI for some very mature hardware from a completely different company. If there's a real competitor without a subscription fee though, I'd love to hear about it.