LastChat is a feature-rich AI assistant app for Android, built as a fork of RikkaHub with an overhauled UI and extra features added using AI agents. It is aimed at people who want a privacy-focused, highly personalized AI chat experience where their data stays on their device.
Developer: Cocolalilal (fork of RikkaHub by re-ovo) · License: AGPL-3.0 (open source) · Price: Free
Before you start: You will need to add your own AI provider (for example an API key for a supported AI service) inside the app to start chatting, since LastChat connects to the providers you configure rather than including one built in.
Official file from the developer's release · Sep 30, 2026 · SHA-256 7c0fac4aabcab6be…
Key features
- Multi-provider AI support with presets plus custom providers, and multi-modal input (text, images, video, audio)
- RAG-based memory so assistants can recall details from past conversations
- Built-in Python engine (PRoot-based Linux environment) and a JavaScript engine (QuickJS), plus web search and MCP server support
- Create and manage unlimited custom assistants with tags, and import/export assistant configurations
- Material You 3 Expressive UI with Markdown, LaTeX, code highlighting, image generation, TTS, and WebDAV backup
Why isn’t LastChat on Google Play?
LastChat is published by its developer on GitHub only. It is a fork of RikkaHub and is not listed on Google Play or F-Droid.
Is LastChat safe?
LastChat is open source under the AGPL-3.0 license, and you can get the official APK from the developer's GitHub releases page. Chat history and vector memory are stored locally on your device, though as with any AI chat app you should check which AI providers you connect and what data you send to them. LastChat 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 LastChat free to use
The app itself is free and open source, but you will likely need an account or API key with an AI provider to actually chat, depending on which provider you choose to connect.
How is LastChat different from RikkaHub
LastChat is a fork of RikkaHub with an overhauled UI and feature additions, modified using AI agents. The README notes it may contain modifications or features not present in the original RikkaHub repository.
Does LastChat store my data in the cloud
No, it is local-first, meaning chat history and vector memory are stored locally on your device. You can optionally back up your data yourself to any WebDAV-compatible server.
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 LastChat free to use
The app itself is free and open source, but you will likely need an account or API key with an AI provider to actually chat, depending on which provider you choose to connect.
How is LastChat different from RikkaHub
LastChat is a fork of RikkaHub with an overhauled UI and feature additions, modified using AI agents. The README notes it may contain modifications or features not present in the original RikkaHub repository.
Does LastChat store my data in the cloud
No, it is local-first, meaning chat history and vector memory are stored locally on your device. You can optionally back up your data yourself to any WebDAV-compatible server.
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