# Web & iOS targets

> For the complete documentation index, see [llms.txt](/llms.txt)

Studio bundles both runners, so one app tests **web** and **iOS** apps. Switch
between them with the **TEST TARGET** control at the bottom-left of the window;
each target has its own scenarios, runs, and settings.

## Web

Works on any OS. Drives your system Chrome or Edge. This is the default target.

## iOS (macOS only)

iOS tests run through the iOS Simulator, which is Apple-licensed and **only runs
on macOS**. On Windows or Linux the iOS target still appears in the switcher but
is disabled, with a one-line note explaining why — so it's clear the option
exists and what it needs.

### Setting it up

Studio bundles the iOS *runner*, but it can't bundle Apple's tools. On macOS,
select the iOS target and studio shows a **setup panel** with a **Check** button.
It verifies your environment — the Xcode command-line tools, `simctl`, and at
least one installed simulator — and tells you exactly what's missing and how to
fix it. When the checks pass, point studio at your `.app` build and run.

See [Quick start — iOS](/start/quickstart-ios/) for the iOS workflow in depth.

## Next

- [Connect your AI agent](/studio/agents/)
- [Under the hood](/studio/under-the-hood/)