Well, Obtainium works - I don't have to do anything, just publish the app wherever and people add url.

Alright! https://zapstore.dev/apps/com.pulselibre Get your Pulsetto here, beware, you have to cancel trial right after ordering the device, because they will bill you for the premium app automatically after 14 days! Get the Fit version, it fits better. And yes, it works, measured on HRV. Good thi...