... than I listed below, feel free to share. (I often listen to podcasts and so far I have my list of options on the market and have also seen some of them on the PH): Mito Health Muse Oura Withings WHOOP Comment from Hemant Prajapati(@prahemant001): @busmark_w_nika  Correct Comment from Hemant Prajapati(@prahemant001): @busmark_w_nika  When I say "social challenges," I mean you can create or join habit-based challenges with your friends or even ... ... that they are relatively pricy and can be lost so easily (e.g. small ring). Comment from Nika(@busmark_w_nika): @prahemant001  I think that including not only friends but also "competing with strangers" or competing team vs