Model Zoo

An on-device AI playground — browse, download, and run open-source on-device AI models on iPhone and iPad.

View the Project on GitHub john-rocky/coreml-models-app

Support

Thanks for using Model Zoo. If something isn’t working or you have a question, this page should help.

Contact

When reporting a problem, please include:

  1. Device model (e.g., iPhone 15 Pro, iPad M2)
  2. iOS / iPadOS version
  3. App version (Settings → About in the app)
  4. The model you were running
  5. A short description of what you expected vs. what happened

Frequently asked questions

What is this app?

A model zoo. You browse a catalog of open-source on-device AI models, download the ones you’re interested in, and run them on your device.

Does it need an internet connection?

Only to fetch the catalog and to download model files the first time. Once a model is installed, it runs fully offline.

Why is a model so large / why is the download slow?

Modern AI models are big. A small language model is typically 1–3 GB; an image generator can be 2–5 GB. Download speed depends on the remote host and your network — most files are served from Hugging Face.

The app says “not enough memory” or crashes during inference.

Some models (large language models, diffusion models, Swin-based transformers) need ≥ 6 GB of device RAM. On older iPhones and iPads these models may fail to load or run. Try a smaller model from the catalog, close other apps, or restart the device.

The Neural Engine seems slow on my device.

A few models are intentionally configured to run on CPU only or CPU + GPU because of known issues with the Neural Engine (e.g., MPS slice bugs on singleton dimensions, or FP16 attention overflow on Swin / DiT architectures). This is a correctness trade-off, not a bug.

Where are the models stored?

Under the app’s own Application Support directory. Uninstalling the app removes everything. You can also delete individual models from the app’s settings screen.

Is my data sent anywhere?

No. All inference runs on-device. See the Privacy Policy for details.

Can I use the outputs commercially?

That depends on the license of each model. Every model’s detail screen links to the original repository and license. It is your responsibility to comply with them.

Can you add model X?

Open a GitHub issue with a link to the upstream repository. Conversion scripts are public — pull requests are welcome.

Is there an Android / macOS version?

The app targets iPhone and iPad. macOS compatibility via “Designed for iPad” may work but is not officially supported. Android is not on the roadmap.

Reporting a bug or vulnerability

For security-sensitive reports, please email us directly rather than filing a public issue.

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