Praktisch is a German grammar trainer for iPhone: nouns (der, die, das), prepositions and their case, Perfekt, Präteritum, adjective endings and verb + preposition, with example sentences and a mistake memory.
What is free and what is paid?
Nouns, prepositions, the mixed round, the Guide, Stats and mistake review are free. "Advanced" adds Perfekt, Präteritum, adjective endings, verb + preposition, B1–B2 vocabulary and typed answers. It is a one-time purchase, not a subscription.
I bought Advanced but it is locked on my new iPhone.
Open Settings → Level → Restore purchases. The unlock is tied to your Apple ID.
A mistake did not come back in the next round.
That is intended: mistakes return a few rounds later, and again at growing intervals, until you have answered them right three times in a row. You can change the delay in Settings → Review, or use "Drill mistakes" to review them at once.
Can I switch between Beginner and Advanced?
Yes, in Settings → Level. Your progress is kept.
Does the app collect any data?
No. See the privacy policy.
Bug reports, wrong answers or suggestions: xyzzz3366@gmail.com. If you report a wrong answer, please include the sentence shown in the app.