FluentSproutFeature · early access · optional
Your key, your bill, your private lessons
If you have an API key for ChatGPT (OpenAI), Gemini or Claude, you can add it in Settings and make extra versions of any lesson: the same words and grammar, in new situations that suit you. It is entirely optional; every lesson works without it.
How it works
- 1
Add your API key
In Settings, paste an API key from OpenAI, Google Gemini or Anthropic Claude. - 2
Press “✨ Make a version”
On any lesson, choose a style: fun, story, game, serious, kids or travel. - 3
Add a theme if you like
For example cricket, cooking or football. The lesson keeps its words and grammar.
Safe by design
Keys are encrypted
Your key is stored encrypted and never shown again after you save it.
Every version is checked
Generated lessons are checked before you see them: structure, no links or code, all lesson words kept, and content moderation.
Private to you
Versions you make are visible only to you.
Your provider bills you
Calls made with your key are billed by your AI provider, under your account with them. We don’t resell or add a margin.
Questions
- Do I need my own key?
- No. All lessons, practice and the built-in tutor work without one. Your own key only adds extra lesson versions.
- Can I just sign in with my ChatGPT account?
- No. It works with an API key from your provider, not with a ChatGPT, Gemini or Claude chat subscription login.
- Which providers work?
- OpenAI (ChatGPT models), Google Gemini and Anthropic Claude.
- Can I remove my key?
- Yes, any time in Settings.