About ChatFix

ChatFix helps you learn English from the messages you already write. Upload a WhatsApp chat and the app finds the real English mistakes you made.

What you get

• Each mistake comes with a correction and a more natural way to say it.
• A short explanation in English and in Brazilian Portuguese.
• Mistakes you repeat are grouped into habits. Learn the rule once and fix many messages.
• Every correct sentence can be read aloud.
• Short practice sessions. Cards you know come back later. Cards you find hard come back sooner.

Your chats, your lessons

Every person uploads their own chats, and the lessons are made from your own messages. Explanations are in Brazilian Portuguese and English for now. More languages are coming soon. You can keep several chats, add more chats to one later, and invite a few people, like a teacher or a friend, to share a chat with you.

Made with AI

Corrections and explanations are written by AI. They are usually right, but not always. If a card looks wrong, you can hide it.

Want to see it first?

The demo uses example sentences, not real chats. You do not need to sign in to try it. Read how your data is handled on the privacy page.