ChatterUI

github.com/Vali-98/ChatterUI Android Apps Open-source projectOpen source

ChatterUI provides a native mobile frontend for language models, supporting local models and connections to remote services.

github.com/Vali-98/ChatterUI
ChatterUI homepage screenshot

About ChatterUI

ChatterUI is an open source native mobile frontend for language models (LLMs). It is designed to give a mobile-friendly chat interface with fine-grained control over how chats are structured. Users can run gguf model files on the device in Local Mode, or connect to remote services in Remote Mode.

In Remote Mode, requests go to external API providers, so how those providers handle data depends on the provider chosen. The app is distributed as an APK from its releases page, and the source states that iOS is currently unavailable.

Key features

  • Runs gguf model files on the device in Local Mode
  • Connects to APIs such as OpenAI, Claude, Ollama, and koboldcpp in Remote Mode
  • Chats with characters using the Character Card v2 specification
  • Creates and manages multiple chats per character
  • Customizes sampler fields and instruct formatting
  • Defines custom API providers through a template system
Best for: Android users who want a mobile chat interface for running gguf models on their device or connecting to supported language model APIs.
Good for
  • Open source, licensed under AGPL-3.0
  • Supports both on-device models and remote API backends
  • Offers two ways to import local models: copying the file into the app or using a file from device storage
Watch out for
  • iOS is currently unavailable, according to the source
  • On-device models must fit within the device's memory
  • Using an external model file can add a slight delay in load times

ChatterUI at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Open source
Yes · Source code
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026

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ChatterUI FAQ

Is ChatterUI available on iOS?
Not currently. The source states that iOS is unavailable because the developer lacks iOS hardware for development.
How do I install ChatterUI?
The source says to download and install the latest APK from the project's releases page.
What license does ChatterUI use?
The repository lists the AGPL-3.0 license.
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