> ## Documentation Index > Fetch the complete documentation index at: https://docs.alpha.isaree.ai/llms.txt > Use this file to discover all available pages before exploring further. # Hardware requirements > Which devices Isa runs on today, and what's coming next. Isa runs on the iPhone, iPad, and Mac. This page covers which devices it supports, the differences between the platforms, what to do if your iPhone is too old to run on-device models well, and the platforms we plan to support next. ## iPhone and iPad Isa requires **iOS 26 or later** and has been tested on **iPhone 13 and newer**. Older iPhones running iOS 26 may still work, but we haven't verified them. If you're not sure whether your iPhone supports iOS 26, check Apple's official compatibility list before installing — the iPhone 11 and later generally support it, but Apple's list is the source of truth. ## Mac Isa requires **macOS 26 or later** and a Mac with **Apple Silicon** (an M-series chip). Intel Macs are not supported. Macs generally have more [RAM](/concepts/ram-device-memory) than iPhones, so larger on-device variants that won't load on a phone run comfortably on a Mac. See [Choose a model](/guides/choose-a-model) for what your Mac's RAM can hold. ## Differences between the platforms Isa works the same across iPhone, iPad, and Mac, with two exceptions: * **Scan Doc camera capture** is iPhone and iPad only. On the Mac, [Scan Doc](/isa/patient-chat#scan-a-document) works with images and PDFs you pick from your files instead. * **Local [MCP servers](/concepts/mcp-servers)** — servers running on the same machine as Isa — work on the Mac only. iPhone and iPad connect to remote MCP servers. ## Picking a model that fits your device Isa runs [LLMs](/concepts/llms-vlms) and [Agents](/concepts/agent) [on-device](/concepts/on-device-vs-cloud), which means model size has to fit your device's [RAM](/concepts/ram-device-memory). A 4B model that runs comfortably on an iPhone 17 Pro will fail to load on a smaller phone. See [Choose a model](/guides/choose-a-model) for guidance on picking a variant that fits. ## If your iPhone is too old for on-device models You don't have to buy a new iPhone to try Isa. Two ways around it: * **Use the Mac app.** If you have an Apple Silicon Mac, [install Isa there](/get-started/install-isa#install-on-your-mac) — its RAM handles on-device models that a small phone can't. * **Switch to a cloud model.** Set the [Primary Agent](/isa/primary-agent) to a [cloud model](/isa/primary-agent#pick-a-cloud-primary-agent) — cloud models run on the provider's infrastructure, not your device, so they work on any iPhone that supports iOS 26. One caveat on cloud models: [Agents](/concepts/agent) themselves are on-device only. A cloud Primary Agent lets you chat in [Patient Chat](/isa/patient-chat) and [Workspace](/isa/workspace), but invoking an Agent (via `@` or in Workspace) still needs an on-device model with enough RAM to load it. ## Coming next * **Android.** We plan to support Android phones and tablets in the future. We don't have a public date yet. Join the [Isaree Discord](https://discord.gg/2R6VvHZpdn) for updates. ## Next Pick the right on-device variant for your device. Download Isa for your Mac, or get it on your iPhone or iPad through TestFlight. Understand the trade-offs between local and cloud models.