Rock
Rock app icon: a black stone on white

Rock

Talk to Rock. It won't tell anyone.

Private AI that runs entirely on your iPhone. Rock runs language models like Qwen3.5 and Bonsai 27B on the phone itself: chat, code and make images offline. Nothing you type leaves it.

Coming soon to theApp Store
  • No account
  • No cloud
  • Works offline
  • Free

Four tools. All on your iPhone.

Chat, a coding agent, image generation and the models behind them. Every one runs on the device.

Chat

Private AI chat

Chat with the language model you choose. It runs on your iPhone, so the conversation stays on your iPhone, even in airplane mode.

  • Models you pick
  • Works offline
  • Stored on device
Rock chat on iPhone: a three-day Lisbon plan written by Qwen3.5 4B running on the device

Code

A coding agent in your pocket

The agent reads and edits files in projects on your iPhone. Every edit is shown as a diff that you approve. Connect GitHub if you want it to clone repositories and open pull requests.

  • A diff for every edit
  • Projects in the Files app
  • GitHub optional
Rock coding agent on iPhone: a proposed edit to src/pace.ts shown as a diff with Approve and Reject

Images

Images, made on the phone

Generate 512×512 images in seconds with SD-Turbo and SDXL-Turbo by Stability AI. Image generation runs on the device, like everything else.

  • SD-Turbo
  • SDXL-Turbo
  • Seconds per image
An oil painting of a lighthouse on a cliff at golden hour, generated on an iPhone by Rock

Models

Any open model that fits

Download any MLX language model from Hugging Face by name. Rock checks its size and memory fit before anything downloads, and downloads continue in the background.

  • Memory check first
  • Background downloads
  • Live device stats
Rock's Models screen: Qwen3.5 4B in use with its memory bar, Bonsai 27B downloading, Qwen3.5 2B recommended

Private by design

Not a setting. There is simply nowhere for your data to go.

  • Runs on your iPhone

    Models run on the device with Apple's MLX. Chats, prompts, images and project files are processed and stored on your iPhone.

  • No servers

    There is no Rock server that receives your chats, prompts, images or files. There is nothing to upload them to.

  • No account

    There is nothing to sign up for and nothing to log in to.

  • No tracking

    No analytics, no ads, no tracking, in the app or on this website.

  • Offline after download

    Once a model is on your iPhone, Rock works without an internet connection.

  • Two connections, both yours

    Hugging Face when you download a model, and GitHub only if you connect it. Nothing else is sent.

Models you choose

Start with a suggestion, or download any MLX language model on Hugging Face by name.

Language

  • Qwen3.5 4BAlibaba Qwen · 4-bit

    The best everyday choice for chat and code

    3.0 GB
  • Qwen3.5 2BAlibaba Qwen · 4-bit

    The quickest replies and the smallest download

    1.7 GB
  • Bonsai 27BPrismML · 1-bit

    The strongest reasoning that fits on a phone

    5.1 GB

Image

  • SD-TurboStability AI

    Fast and light

    2.6 GB
  • SDXL-TurboStability AI

    Sharper detail

    7.0 GB

What you need

iPhone
iPhone 15 Pro or later (8 GB of memory)
Software
iOS 26 or later
Storage
1.7 to 5.1 GB per suggested language model
Internet
Only to download models, and for GitHub if you connect it
Price
Free

Questions

What is Rock?

Rock is a free iPhone app that runs AI models entirely on the device. It offers private AI chat, a coding agent that edits files in projects on your iPhone, on-device image generation and live device stats.

Does Rock work offline?

Yes. After you download a model, Rock works fully offline. You only need an internet connection to download models and, if you connect it, to use GitHub.

Is my data private? Does anything leave my phone?

Nothing you type leaves your iPhone. Chats, prompts, images and project files are processed and stored on the device, and there is no Rock server that receives them. Rock has no account, no analytics, no ads and no tracking. It only connects to Hugging Face when you download a model, and to GitHub if you choose to connect it.

Which iPhones are supported?

Rock needs an iPhone 15 Pro or later, with 8 GB of memory, running iOS 26 or later. Newer Pro models run larger models faster.

Which AI models can I use?

Any MLX language model on Hugging Face: type its name and Rock downloads it. Suggested models are Qwen3.5 4B (3.0 GB), Qwen3.5 2B (1.7 GB) and Bonsai 27B 1-bit by PrismML (5.1 GB). Rock checks every model for size and memory fit before it downloads.

Can Rock generate images?

Yes. Rock generates 512×512 images on your iPhone in seconds with SD-Turbo and SDXL-Turbo by Stability AI.

Can Rock write code and work with GitHub?

Yes. The coding agent reads and edits files in projects on your iPhone and shows every edit as a diff for you to approve. If you connect GitHub, it can also clone repositories and open pull requests. GitHub is optional.

Is Rock free?

Yes. Rock is free, with no account and no ads.

How much storage do the models need?

It depends on the model. Qwen3.5 2B is 1.7 GB, Qwen3.5 4B is 3.0 GB and Bonsai 27B 1-bit is 5.1 GB. Models are stored on your iPhone and excluded from iCloud backup, and you can delete one at any time.

Your AI. Your iPhone.

Free, private and offline.

Coming soon to theApp Store