Built for the modern student.
- Natural voice interaction with Gemini native audio (desktop only)
- Progressive code-switching for stress-free immersion
- Offline-first local storage with cloud backup
- Completely free with your own personal API key
Adaptive Intelligence
Our algorithm tracks your individual vocabulary and swaps in new words only when you're ready.
7 languages and counting.
Pick your native language and the one you want to learn. More languages are on the way.
Completely free. Forever.
LingoBudi doesn't charge you a cent. You bring your own API key and we provide the experience.
LingoBudi Cost
No subscription, no hidden fees, no premium tier. The app is free to use.
Your API Key
Get a free Gemini API key from Google AI Studio. The free tier includes ~250 messages per day — plenty for daily practice.
Need More?
The free tier simply pauses for the day when you hit the limit. If you want unlimited access, you can enable billing in Google Cloud Console — but most learners never need to.
How does this work?
LingoBudi uses the "Bring Your Own Key" model. Instead of charging a subscription, you create a free API key from Google AI Studio and paste it into the app. All AI requests go directly from your browser to Google — LingoBudi is just the interface. This means you get the full power of Gemini without any middleman, and your conversations stay completely private.