Athlytic ($29.99/£29.99 per year) is pretty much a Whoop alternative in its own right, and will also analyze sleep, HRV recovery, trends, and workout performance. You can do most of the analysis below ...
Apple has filed several new patents named ‘Fabric-based items with stretchable bands,’ with one of them revealing a stretchable, fabric-based band, which could make Apple Watch capable of monitoring ...