jev-chat (Jev) is a chat decision assistant that reads your conversation, works out the other person's intent and the risk in the moment, then drafts replies you can tap into the message box. It never sends anything for you; it only fills the text box so you decide whether to send.
Developer: jev-chat (Finderchangchang and contributors) · License: MIT (open source) · Price: Free
Before you start: install the app, open it, and follow its in-app guide to turn on the accessibility service and the overlay permission, so Jev can read the chat on screen and fill replies into the message box. You will also need your own API key for a model provider, since the app does not run its own server.
Official file from the developer's release · Oct 5, 2026 · SHA-256 2e913f248f8bd3ee…
Key features
- Judges intent and risk before drafting any reply
- Checks and ranks several drafted replies so the best fit comes first
- Chinese edition overlays QQ, Feishu, X and WhatsApp; global edition overlays WhatsApp in English
- Fills your pick into the chat's message box, you press send
- Uses your own API key with the model provider you choose, no server run by the developer
Why isn’t Jev Chat on Google Play?
It is published by its developers on GitHub only; it is not listed on F-Droid either.
Is Jev Chat safe?
The project is open source under the MIT license, and the APK on this page is the official v1.7 release file linked from the developer's GitHub repository. Note that it needs an ARM64 Android 11+ phone and asks for accessibility service and overlay permissions to read your chat screen; the developer states chat text only goes to the model provider you configure with your own key, and screenshots used for OCR never leave the phone. Jev Chat comes straight from its developer rather than through Google Play, so it hasn’t gone through Google’s app review. As with any app, check the permissions it asks for and install it if you’re comfortable with them.
How to install
- Tap the download button above: the APK file downloads straight to your phone.
- When Android asks, allow your browser to install unknown apps.
- Open the file and tap Install.
FAQ
Is jev-chat free?
The app itself is free and open source under the MIT license. You do need your own API key from a model provider, and any costs for that key are separate from the app.
Does jev-chat send messages for me?
No. It only drafts and ranks replies, then fills the one you pick into the chat's message box. You still have to press send yourself.
What is the difference between the global and Chinese editions?
The global edition overlays WhatsApp for chats in English and is built by a community contributor. The Chinese edition overlays QQ, Feishu, X and WhatsApp for chats in Chinese, needs an ARM64 phone, and is further along at version 1.7. Both can be installed on the same phone.
More free apps you won’t find on Google Play: Open Source Apps · Best Android apps not on the Google Play Store.
Frequently Asked Questions
Is jev-chat free?
The app itself is free and open source under the MIT license. You do need your own API key from a model provider, and any costs for that key are separate from the app.
Does jev-chat send messages for me?
No. It only drafts and ranks replies, then fills the one you pick into the chat's message box. You still have to press send yourself.
What is the difference between the global and Chinese editions?
The global edition overlays WhatsApp for chats in English and is built by a community contributor. The Chinese edition overlays QQ, Feishu, X and WhatsApp for chats in Chinese, needs an ARM64 phone, and is further along at version 1.7. Both can be installed on the same phone.
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