--- title: "Private On-Device AI Chat for iPhone | Lochan" description: "Chat with Apple's on-device model or open models like Qwen, Gemma and Llama, right on your iPhone. Conversations stay on the phone by default." url: https://lochan.app/on-device-ai updated: 2026-10-11 site: "Lochan" --- Runs on your phone No account On-device AI chat for iPhone # A private AI chat that stays *on your phone.* Lochan includes an on-device AI chat for iPhone and iPad. Talk to Apple's built-in model or a downloaded open model, and your conversations stay on the device by default. Quiet, local, yours. [Download on the App Store](https://apps.apple.com/us/app/lochan/id6785204265) Choose a model - **No account.** No sign-in, ever. - **No analytics.** No tracking, no ad identifiers. - **On-device by default.** Chats live on the phone. - **Share only if you choose.** Via an encrypted link. ![Lochan on-device chat on iPhone explaining that conversations stay private on the phone](https://lochan.app/api/media/84b800d7-0df9-82e4-9f85-2ee6bc574f89/chat.webp) Stays on this iPhone Choose your model ## Which AI models can I run on my iPhone with Lochan? Lochan's chat works with three kinds of models: Apple's on-device model, downloadable open models that run locally, and cloud models you connect with your own API key. Pick per conversation. ### Apple's on-device model Built in, iOS 26+ The model that ships with iOS. Nothing to download, nothing to configure. It runs on the phone, so the conversation does too. On-device ### Downloadable open models Download once, run locally Download an open model to your phone and chat with it locally. Try a few and keep the one that suits you. - Qwen - Gemma - Llama - Phi - SmolLM On-device ### Cloud models, your API key Bring your own key When you want a larger model, connect a cloud provider with your own API key. Your key, your choice, no Lochan account in the middle. - GPT - Claude - Gemini - Grok Optional Conversations that branch ## Edit a message without losing the old answer. In Lochan's chat, editing a message creates a new branch instead of overwriting what came before. Every path of the conversation is still there to go back to. - ### Branch, don't overwrite Rephrase a question or try another model. The earlier reply stays where it was. - ### Share with an encrypted link Conversations stay on the phone by default. When you decide to share one, Lochan creates an encrypted link. One question, two paths. Both kept. Requirements ## What do I need to use on-device AI chat on iPhone? Lochan runs on iPhone and iPad with iOS 26 or later. Apple's built-in on-device model needs iOS 26 or later, and image input needs iOS 27 or later. iOS26+ ### Lochan and the built-in model iPhone or iPad on iOS 26 or later runs the app and Apple's on-device model. iOS27+ ### Image input Attaching images to a chat requires iOS 27 or later. Account0 ### No sign-up No Lochan account and no Lochan server. Cloud models only need your own API key. Questions ## Frequently asked questions ### Do my AI conversations leave my iPhone? Not by default. Lochan keeps conversations on the device, and a conversation only leaves the phone if you choose to share it with an encrypted link or pick a cloud model with your own API key. ### Do I need an account to use Lochan's AI chat? No. Lochan has no accounts and no sign-in, and there is no Lochan server between your phone and your computers. ### Which open models can I download in Lochan? Lochan supports downloadable open models including Qwen, Gemma, Llama, Phi and SmolLM, which run locally on your iPhone or iPad. ### Can I use GPT, Claude, Gemini or Grok in Lochan? Yes. You can connect cloud models such as GPT, Claude, Gemini and Grok using your own API key. ### Does Lochan collect analytics? No. Lochan collects nothing: no analytics, no tracking and no advertising identifiers. Details are in the [privacy policy](https://lochan.app/privacy). ### Which iOS version do I need for on-device AI chat? iOS 26 or later for Lochan and Apple's built-in on-device model. Image input in chat needs iOS 27 or later. Private by default ## Think out loud. Keep it on your phone. The same app that answers your coding agents from anywhere also gives you a calm, private AI chat. [Download on the App Store](https://apps.apple.com/us/app/lochan/id6785204265) [See all features](https://lochan.app/features) Questions? [Visit Support](https://lochan.app/support) or read the [Docs](https://lochan.app/docs).