Local LLM: MITHRIL

Local LLM: MITHRIL

Local AI Models On-Device

15 ratings
9 reviews
Free

Details

  • Released
  • Updated
  • September 8, 2025
  • September 28, 2026

Features

Local LLM: MITHRIL screenshot #1 for iPhone
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About

Run advanced AI language models directly on your device without needing an internet connection. Explore a variety of quantized models optimized for mobile performance and enjoy features like real-time streaming and local data storage.

✓Run AI models locally on iPhone
✓No cloud or internet required
✓Access quantized AI models
✓Supports GGUF-format models
✓Metal GPU acceleration
✓RAG with embeddings
✓SQLite conversation storage
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What's New in Local LLM

2.0.0

September 28, 2026

MITHRIL 2.0 is a new app, rebuilt for iOS 26. • Apple's on-device model and open models from Hugging Face, side by side • An assistant that knows the date and your city, searches the web, and can set reminders, add calendar events, draft texts and emails, find places and run your Shortcuts, using only the abilities you turn on • A Privacy map that shows what stays on your device and what goes online • More accurate dictation and natural voices, all on the device • A floating assistant in Picture in Picture • A live engine dashboard • iPad support

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User reviews

Great

Great, it would be useful Latex format for formulas + RAG with reranker for local content.. Tiny models without RAG are bad.

Add Copy&Pate please!

Otherwise great, but lacks copy and paste of generated text… love the hugging face flexibility to import new models, such as the Qwen3.5 family (please make standard!)

Good but

Needs a bit more stuff, like allowing to edit the system prompt. The rog feature is really good.

bug in iPhone xs

Bug Report: Model Persistence and Startup Errors (iPhone XS)
App Version: Mithril (Local LLM) Device: iPhone XS iOS Version: [ ios 18.3.2]

Issue Summary

I am experiencing two main issues regarding model management and app startup:

Redundant Download Prompt: After successfully importing and downloading a custom model, the app prompts me to download it again every time I select it.

ExecuTorch Error: Every time the app opens, an "ExecuTorch error" appears, even though the model is already present on the device.

Steps to Reproduce

Import a custom model and complete the download process.

Select the model for use.

Observe the prompt asking to download the model again. (Current workaround: I close/force-quit the app to bypass this).

Re-open the app and observe the "ExecuTorch error" notification upon startup.

Expected Behavior

The app should recognize that the model is already stored locally and load it immediately without re-triggering the download prompt.

The app should launch without ExecuTorch errors if the model files are valid and present.

Additional Notes

Despite the error messages, the model does eventually work if I bypass the prompts.

I am using an iPhone XS, so there may be specific optimizations or memory constraints related to older A12 Bionic hardware that are triggering these flags.
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Works as described so far

I’ve just started using the app and it’s working as described. There is one critical feature missing. It must have a way to quickly copy the generated text. Each request and response needs to be able to be copied easily. Preferably with a button or a shortcut. I will update my rating to 5 stars a fast as possible when this feature is added. If there is a stretch goal for this app I would like to be able to use text2image models as well. Great job, and keep up the great work.
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Developer apps

FAQ

What AI models can I run with MITHRIL?

MITHRIL supports a complete model suite including Llama 3.2, Gemma 3, Qwen 2.5, and LLaVA 1.5/1.6. It also integrates directly with the Hugging Face model repository for a wide selection of GGUF-format models.

Does MITHRIL require an internet connection?

No, MITHRIL is designed to run AI models entirely on your device. There is no cloud or internet connection required for its core functionality, ensuring zero data transmission.

What are the system requirements for MITHRIL?

Models run efficiently when their file size is less than or equal to your available RAM. A minimum of 6GB RAM is recommended for larger models, with the iPhone 15 Pro/Pro Max being optimal. iOS 26 is required for Apple foundation models.

How does MITHRIL handle conversations?

MITHRIL uses SQLite for conversation storage, which includes vector search capabilities. This allows for efficient retrieval and management of your chat history locally.

What is the update frequency for MITHRIL?

The latest version, 1.6.2, was released on October 13, 2025. The app is actively developed, with a release date of September 8, 2025, suggesting regular updates.

Is MITHRIL suitable for younger users?

MITHRIL has an age rating of 12+, indicating it is intended for teenagers and older. This is due to the nature of the AI models and their potential outputs.

Does MITHRIL have ads?

No, MITHRIL is ad-free. The app is completely free to download and use without any advertisements interrupting your experience.

What is the performance like on different Apple devices?

MITHRIL utilizes Metal GPU acceleration on Apple Silicon for optimal performance. While it can run on various iPhones, iPads, and iPods, the iPhone 15 Pro/Pro Max is recommended for the best experience with larger models.