Language - English German Thai

This seems like a promising and fun app to learn a basic vocabulary of 500 words in a large number of languages, AND it doesn't require an in-app purchase to use, at least outwardly. I, for one, don't usually download subscription apps unless I know exactly what I'm getting, like the many full-featured educational apps that I do subscribe to. And I have bought many more limited-feature but useful apps like this one, with one-time purchases of a few dollars. In order to stop the annoying ads in THIS app you must download and SUBSCRIBE to a separate app, called "Mag Hanzi", of which I know nothing. A bit on the deceptive side. I wouldn't mind paying several dollars for this app, but not a monthly subscription. Perhaps this app is just a small part of a larger learning system. Who knows? I guess that I can ignore the ads for the time being. But this app needs an explanation of its subscription model to eliminate ads.