There's something about this that is really interesting. I would be interested to see this as a Chrome extension that takes over your browser at specified times for you to schedule meditation throughout the day. The Momentum Chrome Extension comes to mind as a similar product that helps you set focus throughout the day and the way it is pervasive on each new tab you create.
I like it! Does exactly what it needs to do and nothing more. Unfortunate that it can only work when phone is on - I guess this means that for longer sessions, users need to change their auto-screen-off time, right?