Hey, thanks for taking a look! We were also unhappy with the status quo even though the idea of game-theory-optimal poker sims has been around for a while. Glad you like it too :)
Mobile isn't something we've focused on too much, so the UI's a bit small, but you should see the legend below the action bar on the left. Let me know if it's somehow not showing up at all for you though.
We created our app to make it easy and accessible for poker players who aren't necessarily as computer savvy as the average HN'er, so our focus has been on presentation and the quick ability to dig through the data by hand, as a study tool. If you're interested in the raw data there are tools such as PIO (https://www.piosolver.com/), monker (https://monkerware.com/), and Simple (https://simplepoker.com/en/Solutions/Simple_Preflop_Holdem) that give you all sorts of control and more data than you could hope for. But they do take a very long time to run and need some legit hardware to do it, which is why another common approach is to sell the data. (We use monker and some proprietary things to generate and validate our data.)
Mobile isn't something we've focused on too much, so the UI's a bit small, but you should see the legend below the action bar on the left. Let me know if it's somehow not showing up at all for you though.