All in all it’s a good App, but just be aware of potential grammar mistakes. I have been learning German for many years now and have lived abroad in Germany for the past few years. I came home to the US a few months ago and due to the unforeseen circumstances of COVID-19 I haven’t been able to return to Germany. For the time being I’ve been looking for apps to refresh and improve my grammar skills. While looking under the tab “important phrases” and the “grammar test” on the iPad app I noticed the grammar / sentence structure of some sentences were incorrect. For example in the app it says: “Wie lange soll ich den Bus warten?“ this question seems to be constructed in a weird way. A better way to ask this question could be: “Wie Lange soll ich auf den Bus warten?”