opchat: Private AI Chat & LLM

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About this app

opchat is a private AI chat app: run a local LLM offline on your phone, or bring your own API key for OpenAI, Anthropic, Google, DeepSeek, OpenRouter or Ollama.

PRIVATE AI CHAT
Your conversations go straight from your phone to the model you choose and never pass through our servers. Your keys are encrypted on the device. No middleman, no ads, no data selling. Switch models mid-conversation, create personas, group chats into projects, pin and search your history, and export conversations as Markdown or JSON.

YOUR OWN API KEY
Connect the providers you already use and pay them directly, at their own prices. opchat works with OpenAI, Anthropic, Google Gemini, DeepSeek, OpenRouter, Ollama and any OpenAI-compatible server, including one you host yourself. Have a ChatGPT plan? Sign in with your ChatGPT account and start chatting without an API key.

OFFLINE LOCAL LLM
Download a local LLM once from Hugging Face (GGUF or LiteRT) and it runs on your phone with no internet and no account. It keeps working in airplane mode, and nothing you type leaves the device. opchat tells you when a model file won't run on your phone before you start. On-device models can still use your calendar, reminders and memory.

TOOLS & MCP
• Web search and page reading with your own Serper, Tavily or Firecrawl key
• Image generation and editing
• Memory: the AI remembers what matters across conversations
• MCP servers: add any tool server by URL
• Your own skills: describe an API and the AI builds the connector

YOUR APPS
• Calendar: ask what's on your schedule or add events, across every calendar on your phone (Google, Outlook and more)
• Contacts: look up a number, an email or a birthday
• Reminders and to-do lists
• Notion, Google Workspace, Todoist, Linear, Jira and Confluence: connect in a tap

STANDBY
A hands-free voice mode: talk, interrupt, and see cards for what the assistant did. Dictation and read-aloud work in every chat.

PRO, ONE-TIME
Free forever: one cloud AI provider of your choice, on-device models, web search, memory, reminders, dictation and one persona.
Pro is a one-time purchase, not a subscription: all your AI providers at once, Standby, integrations and MCP, your own skills, image generation, unlimited personas, all themes and fonts.

PRIVATE BY DESIGN
opchat is built as a private AI app. We never see your conversations or your keys. The app sends anonymous usage statistics and crash reports to help us improve it; you can turn usage statistics off in Settings. For fully local AI, use on-device models or your own Ollama server.

AI-GENERATED CONTENT
All responses are generated by third-party AI models and may be inaccurate or incomplete. Content safety is enforced by each provider's built-in policies. You can report any AI-generated response directly within the app.

Terms of Use: https://opchat.app/terms
Privacy Policy: https://opchat.app/privacy

What’s new

• A cleaner screen for new chats
• Fixes and stability improvements