# BayesChat - AI chat BYOK MCP — Private AI Chat Agent with MCP

> Unified AI chat client for multiple providers with privacy and customization. (iPhone/iPad app by 永勇 范.)

- Source: https://appshunter.io/ios/app/bayeschat-ai-chat-byok-mcp/id6777948055 (this page in markdown: same URL + `.md`)
- Developer: [永勇 范](https://appshunter.io/developer/6775871728)
- Category: Productivity, Utilities
- Price: Free with in-app purchases (on sale, was $19.99)
- Rating: 1.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 11 MB
- Languages: American English, Danish, Dutch, French (France), German (Germany), Hindi, Indonesian, Italian, Japanese, Korean and 12 more
- Released: 2026-06-17
- Data updated: 2026-08-29
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/bayeschat-ai-chat-byok-mcp/id6777948055/reviews.md

## What is BayesChat?

BayesChat: Privacy-first AI chat, Bring your own key (BYOK), connect any model - local or cloud, support MCP tools & Chat Presets

Key Features:
- Multi-Provider Support: Connect to any model via OpenAI/Anthropic-compatible APIs, including local models
- Chat Presets: Save prompt, model, parameter, and tool as reusable presets. Switch between them with one tap to boost your workflow efficiency
- MCP protocol support: MCP integration for third-party tool calling
- Prompt Variables: Dynamic placeholders for context-aware prompts
- Live Streaming: Real-time typewriter animation rendering with LaTeX formulas and Markdowns
- Local-First Storage: Keys in Apple Keychain, chats in on-device SwiftData — no account, no middleware
- Supports 22 languages including English, Chinese, Japanese, Korean, German, French, Spanish, and more

## Key features

- Connect to multiple AI providers
- Use own API keys
- Smart prompt templates
- Local AI server support
- Customizable interface
- Advanced parameter tuning
- Privacy-focused design

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| BayesChat Pro Access | $19.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/bayeschat-ai-chat-byok-mcp/id6777948055/reviews.md

### 1/5 — 闪退

*2026-07-05*

17.0

**Developer response:** 已经修复了哦

## Frequently asked questions about BayesChat

### What is BayesChat?

BayesChat is a privacy-first AI chat client that allows you to connect to various major AI providers in one application. It supports bringing your own API keys and offers features like smart prompt templates and local AI server connections.

### How does BayesChat handle privacy?

BayesChat prioritizes privacy by storing your API keys securely in the Keychain and not collecting or tracking any user data. All conversations are kept on your device.

### What are the pro features in BayesChat?

The pro features, available with a one-time purchase, include unlimited messages, unlimited providers, MCP tools, prompt templates, chat presets, and advanced parameters. This unlocks the full potential of the application.

### Can I use BayesChat with local AI servers?

Yes, BayesChat supports connecting to local AI servers like Ollama and LM Studio on your home network. This means you can run AI models without relying on cloud services.

### What languages does BayesChat support?

BayesChat supports 22 languages, including English, Chinese, Japanese, Korean, German, French, and Spanish, among others. This broad language support makes it accessible to a global user base.

### How often is BayesChat updated?

The latest version, 1.0.5, was released on July 7, 2026. The app is actively maintained, with updates addressing features and reliability.

### What devices is BayesChat available on?

BayesChat is available on iPhone and iPad devices, indicated by its support for these platforms. It is designed for iOS users.

### What is the age rating for BayesChat?

BayesChat has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content.

## Version history (last 5 releases)

### 1.1.0 — 2026-08-28

• Update App Store screenshot
• Hamburger menu with slide-out history drawer — navigate between chats with a single swipe; settings moved into the drawer for cleaner space
• Long-press context menu on your own messages — edit, copy, or delete with a centered confirmation
• Tool result size badges — each tool call now shows how large the result was, and when a long result was trimmed before sending, it displays both original and sent sizes
• Tool result limit raised to 20,000 characters (up from 6,000) and Max Tokens default raised to 20,480 — your tools and replies have more room before anything gets trimmed
• Advanced reasoning options — choose XHigh or set a custom reasoning effort level; "Off" now correctly disables reasoning for each provider
Also in this update:
• Keyboard-to-composer animation rewritten — one smooth lift drives the keyboard, composer, and chat content together; no more multi-phase bounce on first show
• Send-pin flash eliminated — your message bubble lands instantly at the top without the brief flash at the bottom
• Scroll-to-bottom button glides instead of drags — long jumps now pre-wait for tiles to rasterize, then ease in with a smooth curve
• Third-party keyboards stay stable — cold start and warm re-show pushes no longer drift or bounce
• Fixed header replaces the native nav bar — title bar flash on iOS 17/18 is gone
• Copy feedback and message menu actions restored after a stream finishes

### 1.0.9 — 2026-08-27

• Hamburger menu with slide-out history drawer — navigate between chats with a single swipe; settings moved into the drawer for cleaner space
• Long-press context menu on your own messages — edit, copy, or delete with a centered confirmation
• Tool result size badges — each tool call now shows how large the result was, and when a long result was trimmed before sending, it displays both original and sent sizes
• Tool result limit raised to 20,000 characters (up from 6,000) and Max Tokens default raised to 20,480 — your tools and replies have more room before anything gets trimmed
• Advanced reasoning options — choose XHigh or set a custom reasoning effort level; "Off" now correctly disables reasoning for each provider
Also in this update:
• Keyboard-to-composer animation rewritten — one smooth lift drives the keyboard, composer, and chat content together; no more multi-phase bounce on first show
• Send-pin flash eliminated — your message bubble lands instantly at the top without the brief flash at the bottom
• Scroll-to-bottom button glides instead of drags — long jumps now pre-wait for tiles to rasterize, then ease in with a smooth curve
• Third-party keyboards stay stable — cold start and warm re-show pushes no longer drift or bounce
• Fixed header replaces the native nav bar — title bar flash on iOS 17/18 is gone
• Copy feedback and message menu actions restored after a stream finishes

### 1.0.8 — 2026-08-18

What's New?

• Chat themes — pick a preset with a live preview; your message bubbles and the top bar follow your look
• Keyboard-friendly chats — the latest message stays visible above the keyboard, even on the first keyboard call-up
• Attach multiple photos at once from your photo library
• Backup & Restore — export your chats, providers, prompts, and settings to a file, and restore them anytime; nothing you have is deleted and API keys never leave your device
• Smoother replies — no more stutter when a response finishes
• More reliable tool integrations (MCP) — stable streaming sessions and cleaner tool definitions
• Empty new-chat pages — starter cards lift above the keyboard so they're never covered
• Share sheet fix — sharing now appears right away over Settings on the latest iOS
• Context usage — every reply shows how much conversation context you've used so far; tap it for details
• Tool call details — each tool card shows how large the result was (e.g. 12.4K), and when a long result was trimmed before sending, it shows the original and sent sizes
• Tool result settings — turn result trimming on or off and hide the size readout, under Settings → Chat

### 1.0.7 — 2026-08-09

• Smoother Settings scrolling — no more hitch or jitter during fast inertial scrolls
• More reliable jump-to-bottom — fixed white-screen flash after status-bar layout jumps
• Clearer tool calls & reasoning — live arguments while tools run, cleaner JSON, no text jump when you expand or collapse cards
• Pick up where you left off — reopen the chat you were in after restart; fewer blank screens after long background

### 1.0.6 — 2026-08-02

This is a highly recommended update. We rebuilt core chat performance and caching — if you’re on 1.0.5, update as soon as you can.

• Completely new rendering engine — much smoother scrolling and far less CPU, even on long chats with code, tables, or math
• Better prompt caching — much shorter Time to First Token (TTFT), so replies start sooner on supported providers
• Redesigned reasoning & tool UI — quieter and less distracting while you read the answer
• Unified Reasoning effort — one clear setting in Settings and Chat Presets for how hard the model should think

Also in this release:
• Standard iOS edge-swipe to open chat history
• Finer font-size control
• Markdown export, plus an export loading animation
• Rate-the-app link on the About screen
• iPhone locked to portrait; iPad layout fixes after rotation
• Fixes for Chat Preset select/deselect and related config restore issues

## Related topics

[alkai](https://appshunter.io/ios/topics/alkai) · [boostlingo ai pro](https://appshunter.io/ios/topics/boostlingo-ai-pro)

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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 2026-08-29.*