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Arbiter - Local AI Chat

Arbiter - Local AI Chat

Private, offline AI Assistant

16 ratings
11 reviews
📊 Productivity
🛠️ Developer Tools
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 2, 2025
  • September 14, 2026

Features

Developer

Jordan Stone
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Arbiter - Local AI Chat screenshot #1 for iPhone
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Arbiter - Local AI Chat screenshot #8 for iPhone
🧾$1.99 - $19.99
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About

This privacy-focused AI assistant operates entirely on your device, offering offline functionality. Choose from various open-source models to suit your needs, with all conversations securely stored locally. It's ideal for brainstorming, proofreading, and exploring AI capabilities without data collection.

✓On-device AI processing
✓Offline model execution
✓Document summarization
✓Privacy-focused design
✓Multiple AI model selection
✓Local data storage
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What's New in Arbiter

0.2.09

September 14, 2026

- Create images locally with Stable Diffusion - Find and download compatible models from Hugging Face - Import your own GGUF and MLX models - Work with DOCX and more file formats - Control context size, response length, and sampling - Connect to MCP servers and run tools - Improved context handling, benchmarks, and reliability

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Subscriptions & In-App Purchases

$1.99

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User reviews

Most RecentHighest RatedLowest Rated

Local AI I Can Actually Build Workflows Around

I do a lot of document heavy administrative work involving records that cannot be sent to a hosted service, so local AI is especially valuable to me. Arbiter made it easy to connect a small internal tool to local models through its OpenAI-compatible endpoint and use them for document reading, structured extraction, and drafting without anything leaving my machine. I also appreciate being able to switch models quickly, since some are better at extracting facts while others are better at writing. For my use case, it enables workflows that cloud-based AI simply cannot.
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TonyaS72TonyaS72

Private, Sustainable, and Effective

Finally an AI chat app that gets the job done without ruining the environment or leaking my data!
Tejay0802Tejay0802

Great Private Chatbot

I love that it can be used completely offline and my data is secured!
Emoji user 13466322Emoji user 13466322

Great use of my time

I enjoy how it adapts with my os and truly in a day where our data can easily get leaked. This app has given me the freedom to know my personal information is safe.
Cosmo277Cosmo277

Best AI app

Easy to navigate and no internet required icing on the cake!
Trese719Trese719
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FAQ

What is Arbiter?

Arbiter is a privacy-first AI assistant that runs entirely on your device, offering offline capabilities. It allows you to choose from various open-source models and keeps all your conversations securely stored locally.

Does Arbiter have ads?

No, Arbiter does not contain advertisements. It is a completely ad-free experience, focusing on user privacy and uninterrupted interaction.

What devices is Arbiter compatible with?

Arbiter is currently supported on iPhones. For optimal performance, it is recommended for iPhone 13 Pro or later, or devices with at least 6GB of RAM.

How often is Arbiter updated?

Arbiter was last updated on February 10, 2026, with version 0.1.96. This indicates a relatively recent update, suggesting ongoing development and maintenance.

Can I upload documents to Arbiter?

Yes, Arbiter allows you to upload documents from your device. You can then get summaries and key insights directly from these files.

What is the age rating for Arbiter?

Arbiter has an age rating of 4+, making it suitable for a wide range of users. This rating indicates minimal content concerns.

Are there any hidden costs with Arbiter?

No, Arbiter emphasizes 'No Hidden Costs.' It avoids expensive cloud fees by processing AI models locally on your device.

What makes Arbiter different from other AI assistants?

Arbiter's key differentiators are its complete on-device, offline operation and strong privacy focus, with no accounts, servers, or data collection. It also offers flexibility in choosing different AI models.