R10

I'm gonna get laughed at, or flack for this, but I use a Colmi R10 from AliExpress, primarily because its cheap as heck (I paid $40 CAD with free shipping), has a roughly 5 day battery life (so far) and the app tracks sleep, activity, heart rate ( I set at 20 min intervals), blood oxygen and step co

I use an AliExpress brand named Colmi R10. It's inexpensive and the tracking is about as accurate as the ones that cost hundreds of dollars. No subscription and the power lasts about a full week on a single charge.