I haven't tested the app (I'd actually like to), so I don't know how far they went with the web view approach. I could imagine that the graph feels pretty stati

I haven't tested the app (I'd actually like to), so I don't know how far they went with the web view approach. I could imagine that the graph feels pretty static, and taking a native approach and spent some more effort on a playful experience could already solve the rejection. No need for made up features. Keep it simple! That seems the magic of the app.