Exploring meditation and mindfulness app, I found one which is very interesting and very much connected to what I am trying to achieve. It was Sway.

What I like about it is not the app itself, but the concept and scientific background of it. More information on that you can find here:
https://ustwo.com/blog/introducing-interactive-meditation

Cover image:
https://giphy.com/gifs/meditation-qK2KaYr3Uhnq0