Earlier quoted context omitted.
I used to use an Oura ring but the accuracy is actually not so great (Potentially going to get better with new algorithm coming out) and switched to a fitbit charge 5. App is pretty slick and really easy to see your sleep data, also quite a small wearable. There's a youtuber who compares all wearables for accuracy with actual sleep measuring equipment and Fitbit charge 5 is (surprisngly) the most accurate. Here's a l…
Anecdote (and obligatory YMMV): I purchased the Charge 4 when it first came out and after extensive usage, I tossed it in the trash. The final straw for me was when I was having a physical done and compared the HRM data of the watch to what the readings the nurse was getting with her device. The data reported by the Fitbit was wildly inaccurate compared to the readings that the nurse was seeing. I also compared my da…
For me, these devices are good to spot trends over time, (eg "how has my resting heartrate improved after 4 weeks of being more physically active?") rather than comparing my data to someone else's.