# Chapper: AI & LM Studio Client — Local LLM & AI Chat Client

> Privacy-first AI chat client for local LLMs and self-hosted AI servers. (iPhone/iPad app by Prevolut Ltd.)

- Source: https://appshunter.io/ios/app/chapper-ai-and-lm-studio-client/id6760984679 (this page in markdown: same URL + `.md`)
- Developer: [Prevolut Ltd](https://appshunter.io/developer/1887148189)
- Category: Productivity, Developer Tools
- Price: Free with in-app purchases
- Rating: 3.30/5 from 7 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 142 MB
- Languages: Russian, American English, Arabic, Dutch, European Spanish, Italian, Korean, German (Germany), Polish, Brazilian Portuguese and 3 more
- Released: 2026-03-31
- Data updated: 2026-08-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/chapper-ai-and-lm-studio-client/id6760984679/reviews.md

## What is Chapper?

Chapper is a powerful, privacy-first AI chat client for iPhone and iPad that runs on-device models and connects directly to local LLMs, LM Studio, self-hosted AI servers, and OpenAI-compatible endpoints.

No accounts. No forced cloud. No subscription.

Whether you run LM Studio, Ollama, llama.cpp, or another OpenAI-compatible endpoint, Chapper gives you a polished, fully native iOS experience for chatting with your models, managing conversations, tuning inference settings, using tools, and working with local AI on your own terms.

Built in SwiftUI from the ground up, Chapper is designed to feel like a real iPhone and iPad app, not a web wrapper.

FEATURES

• On-Device Local Models
Run supported AI models directly on iPhone and iPad for private local inference, including MLX models and Apple Foundation Models where available.

• Personas
Create and switch between custom AI personas, each with their own system prompt, tone, and language. Built-in personas include Code Expert, Translator, Teacher, Analyst, Brainstormer, and more.

• Thought Process
See reasoning output from supported models in a collapsible panel above responses.

• Rich Markdown Rendering
Full support for code blocks, tables, lists, emphasis, and structured responses.

• Model Management
Browse, inspect, select, load, and unload models directly from the app where supported. View quantization, context length, tool support, vision support, and active status.

• MCP Tools
Built-in tool workflows for web search, current time, server status, model listing, chat search, file and directory access, URL fetching, export actions, and more.

• C.A.S.H. Terminal
A built-in sandboxed terminal environment for practical local workflows, file operations, shell scripting, and AI-assisted tool execution.

• Files App Integration
Access Chapper workspace files directly in the iOS Files app, including exports and tool-related content where supported.

• Memory
Save useful long-term information and inject it into conversations automatically for more consistent assistance across chats.

• Prompt Templates
Save and reuse common prompts instantly.

• Full Parameter Control
Adjust temperature, token limits, repeat penalty, Top-K, Top-P, Min-P, TFS-Z, Flash Attention, KV-cache offload, context length, keep-alive, structured output, and more.

• Search
Full-text search across chats and message history.

• Export
Export conversations in multiple formats including TXT, PDF, HTML, Markdown, JSON, CSV, and XML.

• Keychain Support
Store API keys securely using iOS Keychain.

• iCloud Sync
Optionally sync chats across devices with iCloud.

• Analytics Dashboard
View on-device usage stats and activity insights.

• Text to Speech
Listen to responses with native, local, or server-based TTS playback.

• Chat Info
Inspect timestamps, counts, tags, folder assignment, and other conversation metadata.

• Server Tools
Configure, save, and reuse server connections for a smoother local AI workflow.

• JSON Lab
Work with custom JSON requests and experimental API workflows directly inside Chapper.

• Chapper Pro
One-time purchase. Unlock unlimited chat history, all export formats beyond plain text, advanced sampling and structured output controls, MCP tools in normal chat, C.A.S.H. terminal access with shell scripting and AI shell tooling, premium personas and prompt templates, memory and analytics extras, iCloud sync, live vision chat, premium appearance options including additional app icons, and future Pro features. No subscription.

COMPATIBILITY

Chapper works with on-device models, LM Studio, Ollama, llama.cpp, and OpenAI-compatible servers. Some features depend on your model or server.

PRIVACY

Chapper is built with privacy in mind. Your chats stay on your device unless you explicitly enable iCloud sync or connect to your own server. No accounts required. No third-party tracking.

Chapper is built for people who care about local AI, privacy, model control, and a true native iOS experience.

## Key features

- On-device local models
- Custom AI personas
- Rich Markdown rendering
- Model management
- MCP Tools integration
- Sandboxed terminal environment
- Export conversations in multiple formats

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Chapper Pro | $9.99 | one-time |
| Mini Tea | $0.99 | one-time |
| Cup of Tea | $1.99 | one-time |
| Can of Tea | $6.99 | one-time |
| Barrel of Tea | $44.99 | one-time |
| Kettle of Tea | $12.99 | one-time |
| Crate of Tea | $24.99 | one-time |
| On Device Local Inference | $4.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/chapper-ai-and-lm-studio-client/id6760984679/reviews.md

### 4/5 — good app, minor bugs

*2026-07-11*

Needs more updates considering it is a paid app to use the feature. System prompt feature sends what it wants to rather than what you tell it to. So that’s broken in that regard.

## Frequently asked questions about Chapper

### What is Chapper?

Chapper is a privacy-first AI chat client for iPhone and iPad that allows you to run on-device models and connect to local LLMs, LM Studio, self-hosted AI servers, and OpenAI-compatible endpoints without requiring accounts or cloud services.

### Does Chapper have ads?

No, Chapper does not contain advertisements. It is a free application designed for a seamless user experience without interruptions.

### What platforms does Chapper support?

Chapper is available for iPhone and iPad, offering a native iOS experience built with SwiftUI.

### How often is Chapper updated?

The latest version of Chapper is 1.3.0, released on May 20, 2026. Updates are provided to enhance functionality and reliability.

### Can I use Chapper offline?

Yes, Chapper supports on-device local models, allowing you to run supported AI models directly on your iPhone and iPad for private local inference, even without an internet connection.

### What kind of personas can I create in Chapper?

You can create and switch between custom AI personas with unique system prompts and tones. Built-in personas include Code Expert, Translator, Teacher, Analyst, and Brainstormer, among others.

### What export formats does Chapper support?

Chapper allows you to export conversations in multiple formats, including TXT, PDF, HTML, Markdown, JSON, CSV, and XML, facilitating easy sharing and integration with other tools.

### How does Chapper handle API keys?

Chapper uses iOS Keychain for secure storage of API keys, ensuring your sensitive information is protected.

## Version history (last 5 releases)

### 1.3.1 — 2026-08-06

What's New in 1.3.1
Dear Chappers, this update fixes a lot of bugs and logic errors, and brings some new features to improve the Chapper experience.

• Dozens of small fixes and inconsistencies resolved under the hood
• Fixed an issue where template icons wouldn't apply correctly
• Fixed MCP server settings occasionally opening the wrong menu
• Smoother, more reliable app flow throughout chat and local model use
• First look at Agent Mode, letting Chapper handle multi-step tasks with checkpoints along the way
• Quick model switching
• Bigger AI answer field for easier reading
• Smaller UI tweaks and little features added throughout
• Updated animations for a smoother feel
• General polish
• And much more

We've received so much positive and constructive feedback from all of you, and we are grateful. Thank you for being part of the Chapper journey. More updates are on the way.

### 1.3.0 — 2026-05-20

Chapper 1.3.0 is a major update focused on local AI, better tool use, and a smoother everyday chat experience.

New in this release:
• On-device local models for private AI directly on iPhone and iPad
• Live Activities for ongoing chats and local generation
• Support for Apple Foundation Models where available
• MLX local model support with improved loading, generation, and model management
• Better local vision model handling
• Improved LM Studio and MCP tool workflows
• New Brave Search option for web search
• More reliable MCP tool execution for files, web search, URLs, time, memory, shell actions, and server tools
• Improved C.A.S.H. filesystem behavior and clearer tool activity reporting
• Updated Pro and local model purchase flows
• UI refinements across Settings, model management, chat, and tool activity views
• More robust iCloud sync behavior
• Improved chat composer behavior and cursor stability
• Fixes for user-reported MCP, local model, StoreKit, and UI issues
• General reliability, compatibility, and polish improvements across Chapper

Chapper 1.3.0 makes local AI, MCP tools, and everyday chat workflows more powerful, private, and reliable.

### 1.2.4 — 2026-05-11

This update adds the first version of server-side MCP support in Chapper while also improving general consistency and fixing bugs.

What’s new:
• LM Studio MCP integrations via LM Studio Native mode
• Custom Remote MCP servers for Streamable HTTP endpoints
• MCP diagnostics for endpoints, status, active integrations, and Native mode paths

Also improved:
• Chat management consistency improvements
• Bug fixes and stability improvements based on user feedback
• UI enhancements

Note:
• LM Studio MCP and Custom Remote MCP are beta features and still work in progress

### 1.2.3 — 2026-04-12

This smaller update brings reliability fixes for conversations.

What’s fixed:
• Improved multi-turn chat context handling
• More robust streaming and continuation behavior
• Additional stability improvements behind the scenes

### 1.2.2 — 2026-04-11

This update includes a smaller round of polish and reliability improvements.

What’s new:
• Improved Spotlight support
• Additional interface polish
• General reliability improvements

## Related topics

[llm local client](https://appshunter.io/ios/topics/llm-local-client) · [genero development client](https://appshunter.io/ios/topics/genero-development-client)

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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 2026-08-25.*