This is nice! I like the graphs and the general feeling, and the utility is important as well. One minor UX tweak: remove the tile description text ellipsis and nowrap and just let it flow and wrap. Makes browsing the main page much better, otherwise I have to navigate into each tile and then back just to understand what it is about.
I agree with this comment. I wish I could see the full desc on each card on the homepage, and most descriptions are only a few lines anyways. I was also having an issue with the x button. It wouldn’t respond and then I’d tap again eventually causing it to open the card behind it.