v0.1.0 · Android build

Speak English with an AI partner.

ChatLingo is an AI-powered conversational language learning app. Chat with a friendly AI partner in real time, receive instant corrections and feedback, get a personalized CEFR assessment and weekly study plan, and track your progress with vocabulary review — all through natural conversation.

Download Android version Explore features

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An Android build is available now, hosted on this site — no app store account required.

Android Android 6.0+

v0.1.0

52.7 MB · Updated 2026-09-09 · Free · No ads

Download APK Allow "install from unknown sources" on first install.

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iOS Coming soon

Coming soon

Planned via TestFlight; the invite link will be posted here once available.

Check back — link posted on release

Features

Everything you need for speaking practice, in one app.

AI scene conversations

Role-play with AI characters across 5 scenes — café, restaurant, airport, hotel and directions — with real-time streaming replies.

Voice in · voice out

Hold to talk — speech is transcribed in real time (Whisper); AI replies can be spoken aloud (Edge TTS) for listening practice.

Instant corrections

Grammar and phrasing feedback on every exchange, with translation and teaching cards — mistakes resolved as you go.

CEFR assessment · weekly plan

A 3–5 minute adaptive conversation estimates your CEFR level (A1–C1) and builds a weekly study plan.

Vocabulary review · achievements

New words are extracted automatically into a spaced-repetition queue; 12 achievements mark your milestones.

History · statistics

Revisit past conversations, and track daily/weekly stats and streaks showing your progress curve.

FAQ

How do I install the app?

Download the APK and open it — your device may ask you to allow "install from unknown sources" the first time (the exact prompt varies by Android version). No app store account needed.

How do I update when a new version ships?

Return to this page and download the new APK to cover-install. Account and learning data live in the cloud. Current version: v0.1.0 (2026-09-09).

What is the microphone used for?

Only for speech-to-text input: hold to speak and audio is transcribed to text in real time. Audio is not saved. If you decline access, text input still works fully.

Is the app free?

Yes — free, no ads, no in-app purchases. Future pricing of advanced features will be announced in advance.

What about my data?

Conversations are used only for your current session and statistics, never for other purposes. You can delete your account from the Profile tab at any time; details in the privacy policy.

Is a network connection required?

Yes — AI chat, assessment and TTS run online. Mobile data and Wi-Fi both work; downloading the 52.7 MB build over Wi-Fi is recommended.