2 or 3 stars for version I got from APKPure, 4 or 5 stars for version I got directly from Google Play. When I got  an update from APKPure, Awesome Breathing stopped working properly (on APKPure version, the minimum time for "inhale", "inhale hold", "exhale", and "exhale hold" is one second instead of 0, which prevents some of the preset breathing from working properly, and limits the options for custom breathing programs). I uninstalled the app on APKPure, and replaced it with a version I got directly from Google Play, and it's working properly again.