Settings
Everything is optional — the app is fully free without a key.
AI feedback (optional)
Add your own Anthropic API key for full examiner-grade Writing & Speaking feedback and the AI tutor. Without one, you still get instant offline estimates.
🔒 Your key is stored only in this browser (localStorage) and sent directly to your backend with each request. It is never logged or shared. Get a key at console.anthropic.com.
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Your data
All progress lives in your browser. Nothing is sent to any server except AI scoring requests.