Local LLM on iPhone and iPad
Download a model once and it keeps answering with the network off. The same app runs on iPhone and iPad, open source, no account.
What you need to run a local LLM on iPhone
An iPhone and some free storage.
How to run an LLM on iPhone
Three steps. The model download takes the longest.
Download on the App Store
The app is free and works on iOS 16.2 and up. There is no account and nothing to sign up for.
Pick a model
Choose one inside the app. It downloads once and stays on your device. Delete it later if you need the space.
Switch to airplane mode
The model runs on the device itself. It keeps answering on a plane, on the metro and anywhere with no signal.
Offline in airplane mode
The model file sits on your device. The iPhone does the work, so nothing is sent anywhere.
No signal, no problem
On a plane, on the metro, in a basement. You need the network once, for the model download, and never again.
Nothing leaves the device
Your messages stay in the app. There is no account, no server and nothing saved in a cloud.
Same app on your Mac
Atomic Chat also runs on Mac, Windows, Linux and Android. Bigger models on the desktop, the same idea in your pocket.
Learn more in our blog
How to Run an LLM Locally
Pick a model for your hardware, understand quantization, and set it up in a few clicks.
Best Local LLM Apps in 2026
The 10 best local LLM apps compared on interface, platform reach, openness and tool support.
How to Run DeepSeek Locally
Run DeepSeek R1 offline — which distilled sizes fit your hardware, and the step-by-step setup.
FAQ
What people ask before running a local LLM on an iPhone.
Yes. The model file sits in your storage and the device does the work. iPhone models are smaller than desktop ones, but they are quick enough for everyday use.
iOS 16.2 or newer.
Yes. The same app runs on iPhone and iPad.
The app is about 85MB. Each model takes storage on top of that, and you can delete a model when you need the space.
Yes. You need the network for the first model download. Everything after that works offline, including airplane mode.
Yes. Free on the App Store, open source, and there is no account and no subscription.
Yes. Your messages stay on the device. Nothing is sent to a server and nothing is saved in a cloud.
The Mac app handles bigger models, up to 13B with 32GB of memory. On iPhone you pick from the models offered in the app.
Yes, for Mac, Windows and Linux. Same app, bigger models.
Yes, on Google Play, for Android 7.0 and up.
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