That is cool that it works offline. I will not use it because I don't like the voices. The free meditation app I would recommend is the Healthy Minds program[1]. I have also seen Medito recommended, but the thing that I like about the HM Program is that it is a very straight curriculum, instead of various options scattered as options.

[1]https://www.humin.org/wellbeing-tools/app

Medito is good Open Source alternative as well. https://meditofoundation.org/

Title should say "meditations" — app is not for actual dispute resolution (well, not directly).