Write correctly → Think correctly → Speak confidently
🎯 Your top weak spots right now
Quick actions
Daily tip
Grammar Rules
All grammar topics from your sessions with Claude
Vocabulary Bank
Click ✓ on any word to mark it as memorized — it moves to the done pile!
Progress:
🔍
Look up & add a word
Type any German word you encountered — AI will identify it
Type:
Key Sentences
All sentences from your sessions — filter by tense and study the structure
Verb Tables
Conjugations and tricky irregular verbs
Haben & Sein conjugation
| Person | HABEN | SEIN | In Perfekt |
|---|---|---|---|
| ich | habe | bin | Ich habe/bin ... |
| du | hast | bist | Du hast/bist ... |
| er/sie/es | hat | ist | Er hat/ist ... |
| wir | haben | sind | Wir haben/sind ... |
| ihr | habt | seid | Ihr habt/seid ... |
| Sie/sie | haben | sind | Sie haben/sind ... |
Click any verb to expand — full conjugation, all forms and usage variations with 🔊 pronunciation
Conversation Simulator
Practice real Berlin-life conversations. AI plays the other person — respond in German. Tap 🎤 to speak.
Choose a scenario
Sentence Builder
Write German sentences — AI corrects and annotates every word. Exercises shuffle every session so you always get a fresh set!
How to use: Pick a scenario, read the English sentence, write your German version. AI corrects and annotates every word!
Choose a scenario
My Mistakes
AI tracks your errors automatically. Export to use on any device!
Reading Practice
Simple German news — click any underlined word to translate and add it to your vocabulary!
Words added today: 0
Articles read: 0
Verb Position Drill
Fill in the correct verb form — exercises shuffle and never repeat until all done!
AI Quiz
Dynamic questions generated fresh from your weak areas — never the same twice!
Questions are generated fresh by AI each time — targeting your weak spots!
AI Tutor
Ask anything about German — get explanations tailored to your level
Your API Key
Key is saved locally in your browser — never sent anywhere except Anthropic
☁️ Cloud Sync — Firebase
▶ configure
Enter once per device — saved in browser only, never in GitHub. Same data on all devices automatically.
⚡ API Key (required — enter each time)
Project ID
Auth Domain
Storage Bucket
Sender ID
App ID
⚡ User ID — must be identical on every device
My Progress
Live stats from your real practice data
✓ Strengths
✗ Areas to practise