# opchat: Private On-Device AI — Multi-provider BYOK assistant

> Private on-device AI chat with multiple model integrations and custom personas. (iPhone/iPad app by Przemyslaw Klosek.)

- Source: https://appshunter.io/ios/app/opchat-private-on-device-ai/id6761932211 (this page in markdown: same URL + `.md`)
- Developer: [Przemyslaw Klosek](https://appshunter.io/developer/1536276533)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 4.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 12+
- Requires: iOS 16.4 · 63 MB
- Languages: American English
- Released: 2026-04-23
- Data updated: 2026-07-29
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/opchat-private-on-device-ai/id6761932211/reviews.md

## What is opchat?

opchat lets you chat with all major AI models in one place — using your own API keys or running models directly on your device. Your API keys stay on your device, encrypted with secure storage. Your conversations are sent directly to the AI provider you choose and never pass through our servers. We don't collect, store, or have access to your chats. No middleman, no subscriptions, no data harvesting.

BRING YOUR OWN KEYS
Connect OpenAI (GPT), Anthropic (Claude), Google (Gemini), DeepSeek, OpenRouter, Straico, Azure, Ollama, or any OpenAI-compatible endpoint. Switch between models mid-conversation or set a default per persona.

ON-DEVICE MODELS
Run AI models directly on your device — completely offline, no API key needed. Browse and download GGUF models from Hugging Face. Your data never leaves your phone. Perfect for privacy-sensitive use or when you're offline.

CUSTOM PERSONAS
Create AI assistants tailored to your needs. Set a system prompt, personality, speaking style, knowledge areas, and conversation starters. Build a research analyst, a coding mentor, a creative writing partner — whatever you need.

BUILT-IN TOOLS
• Web Search — real-time results via Serper or Tavily
• Image Generation & Editing — create and refine images with AI
• Voice — speech-to-text input and text-to-speech output
• Memory — the AI remembers context across your conversations
• MCP Servers — extend with custom tools via Model Context Protocol

ORGANIZE YOUR WORK
Group conversations into projects. Pin important chats. Search across all your history. Export conversations as Markdown or JSON.

FULLY CUSTOMIZABLE
Choose from multiple themes (Claude, GPT, Perplexity, Code) or create your own with custom colors. Pick from 23 fonts. Adjust message density, roundness, and font size.

PRIVATE BY DESIGN
Zero tracking. Zero analytics. Your API keys are encrypted on-device. Conversations go directly to your chosen AI provider — we never see them. Use on-device models or Ollama for fully offline, local AI with no data leaving your phone.

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

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Unlock | $4.99 | one-time |
| Pro Unlock Promo | $1.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/opchat-private-on-device-ai/id6761932211/reviews.md

### 4/5 — ….

*2026-07-12*

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.

## Frequently asked questions about opchat

### 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.

## Version history (last 4 releases)

### 1.2.2 — 2026-07-27

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.

### 1.1.4 — 2026-04-27

What's new:
• Codex (ChatGPT Subscription) — sign in with your ChatGPT account and use Codex models like gpt-5.5, gpt-5.4 and gpt-5.3-codex without an API key
• Refreshed provider picker with real brand logos
• Smoother onboarding animations and transitions
• System language is now correctly detected on first launch for all supported languages
• Bug fixes and stability improvements

### 1.1.3 — 2026-04-25

Bug fixes and stability improvements.

### 1.1.2 — 2026-04-23

No release notes.

## More apps by Przemyslaw Klosek

- [Skinlion](https://appshunter.io/ios/app/skinlion/id1536276531)
- [Dailybird: Private Day Counter](https://appshunter.io/ios/app/dailybird-private-day-counter/id6758921113)

All apps by Przemyslaw Klosek: https://appshunter.io/developer/1536276533

## Related topics

[clink ai](https://appshunter.io/ios/topics/clink-ai)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-29.*