Breathly is a minimalistic free and open-source app for daily relaxation and breath training: just choose a breathing technique and focus on the guided exercise.
There are no ads, no in-app purchases, and no trackers in Breathly.

Breathly is available in the Google Play Store and in the Apple App Store:
– Android: https://play.google.com/store/apps/details?id=com.mmazzarolo…
– iOS: https://apps.apple.com/app/breathly/id1454852966
– F-Droid (Android): https://f-droid.org/en/packages/com.mmazzarolo.breathly/