Rill — AI Chat

Rill is a lightweight, native way to chat with the AI models you already use. ALL YOUR MODELS, ONE PLACE Connect supported providers with your own API keys. Browse their model directories, choose an exact model, and keep your conversations organized with local date titles. JUST CHAT A calm interface keeps the answer and your draft in focus. Send text and images together. If a stream is interrupted, the text already received stays available with a clear status. KEEP THE WHOLE CONVERSATION Read continuous Markdown answers, tables and code. Search your local history. Edit an earlier prompt to begin a branch while keeping the original. Rill sends the complete applicable branch history without silently shortening it or creating automatic summaries. Provider context limits still apply. COMPARE ANSWERS Bring selected models into a private group conversation. Each model keeps its own context by default. Compare their replies, add a reaction yourself, and view reasoning summaries when the provider explicitly exposes them. YOUR KEYS. YOUR CHOICE. Provider credentials are stored through the system Keychain. Requests go directly to the destination you choose. No Rill account, subscription or in-app purchase is required. Try the clearly labeled, offline Rill Demo without a key; it uses fixed samples, not a live AI model. Made for iPhone and iPad, with English, Simplified Chinese and Traditional Chinese, plus Light and Dark appearances. Supported configuration paths include OpenAI, Anthropic, Google Gemini, xAI and OpenAI-compatible endpoints. Models, capabilities, service availability, fees and data retention depend on your provider. Your chosen service may receive your message, applicable conversation history, system prompt and attachments. AI responses may be inaccurate; check important information.