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GPTMobile vs ChatterUI: catalog facts
GPTMobile	ChatterUI
Free The app is free and open source; API usage is billed by each model provider.	Free Free to download from its GitHub repository.
Android	Android
Compares answers from several models at once Supports OpenAI, Anthropic, Google, Groq and Ollama	Runs models on the phone itself Can also connect to API providers of your choice
Requires your own API keys or an Ollama server Android only	On-device performance depends on the phone's hardware The research does not state the license
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-only	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.