The app is great, it has been of a huge help for me ! One small issue though, it seems words that have been categorized as "Studied" don't appear anymore when I launch a Study session from the Lists tab (is it from the last update ?). It would be nice if there was an option to allow them to appear, or to remove their "Studied" status. Also the app crashes when I open the "Memorized" tab in "Study". But it may just be with my Huawei phone.