I tried the free trial of this app and I genuinely liked the concept it provided. However to pay €90(!) a year for content that they have gathered from other sources and then bundled into their own format is just outrageous. For that money I could buy myself the original books and research summaries that they have quoted in their courses. I won’t deny that the app offers a nice method of reading and learning, it looks professional, they put in effort, it doesn’t crash, and it is easy to use. If this app would charge a maximum of €25 a year I would have gotten it, but €90 (sorry; €89.99) a year feels needlessly excessive and even greedy.