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opchat: Private On-Device AI

opchat: Private On-Device AI

Multi-provider BYOK assistant

1 ratings
1 review
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • April 23, 2026
  • July 27, 2026

Features

Developer

Przemyslaw Klosek
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🧾$1.99 - $4.99
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About

Chat with various AI models using your own API keys or run them locally on your device. Your data and keys remain private, never passing through the app's servers. Create custom AI assistants and utilize built-in tools like web search and image generation.

✓BYOK (Bring Your Own Keys) for major AI models
✓On-device model execution for offline use
✓Customizable AI personas
✓Integrated web search and image generation
✓Conversation organization and export
✓Fully customizable interface themes and fonts
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What's New in opchat

1.2.2

July 27, 2026

A lot has landed since the last update. Skills — connect the assistant to the services you already use and let it do the work, not just talk about it. Costs — see exactly what each model and each day costs you, filtered by date. Memory — remembers what actually matters, in your language. Plus reminders, web search with sources, and Codex sign-in that runs in your browser.

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In-App Purchases

$4.99

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User reviews

Most RecentHighest RatedLowest Rated

….

I really like the app and enjoy using it. The AI chat experience is very useful.

The only issue is that I don’t understand why file sending and receiving does not work properly with the AI. It can be frustrating when attached files are not actually accessible to the model.

I hope this feature will be improved in the future.
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FAQ

Does opchat have ads?

No, opchat is ad-free. The app is free to use and does not display advertisements to users.

How does opchat ensure privacy?

opchat is designed for privacy. Your API keys are encrypted and stored on your device, and conversations are sent directly to your chosen AI provider without passing through opchat's servers. The app collects no user data.

Can I use opchat offline?

Yes, opchat supports running AI models directly on your device, allowing for completely offline use without needing an API key. You can browse and download GGUF models from Hugging Face for this purpose.

What AI models can I connect to opchat?

opchat supports major AI models including OpenAI (GPT), Anthropic (Claude), Google (Gemini), DeepSeek, OpenRouter, Straico, Azure, Ollama, and any OpenAI-compatible endpoint.

How can I customize AI assistants in opchat?

You can create custom AI assistants by setting a system prompt, personality, speaking style, knowledge areas, and conversation starters. This allows you to tailor an AI for specific tasks like research or coding.

What built-in tools are available in opchat?

opchat includes several built-in tools such as real-time web search, AI image generation and editing, speech-to-text and text-to-speech voice capabilities, and a memory function for context across conversations.

What platforms is opchat available on?

opchat is currently supported on iPhone and iPad devices.

How often is opchat updated?

The latest version of opchat is 1.2.2, and it was last updated on July 27, 2026. Updates typically include new features, bug fixes, and performance improvements.