For anyone wondering, this appears to be the app: https://steprimo.com/android/us/app/io.linga/Linga-Read-booksLearn-Spanish-French-German/ https://steprimo.com

For anyone wondering, this appears to be the app: https://steprimo.com/android/us/app/io.linga/Linga-Read-booksLearn-Spanish-French-German/ https://steprimo.com/android/us/app/io.linga/Linga-Read-book... (it's been instantly deleted from the google play store, which is just hilarious Google "minimum viable everything" behavior).