> ## Documentation Index
> Fetch the complete documentation index at: https://momentic.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Infrastructure

> Run tests locally, or on Momentic-hosted browsers and remote emulators/simulators.

By default, tests run wherever you run the CLI: a local browser for web, or a
local emulator or simulator for mobile. As an option, Momentic can run them on
managed infrastructure instead: hosted browsers and remote emulators and
simulators, provisioned on demand, so you do not have to set up or maintain them
yourself. This page covers where tests can run and how to choose.

## Web browsers

Web tests run on a Chromium-family browser. Choose Chromium, Google Chrome, or
Chrome for Testing per project or per test, and Momentic applies the same
runtime overrides (user agent, viewport, and similar) on every run so results
match between machines. By default the browser runs on your own machine or CI
runner, with hosted browsers as an option. See
[browsers](/platforms/web/browsers) for the full list and how to set a default.

## Remote emulators and simulators

As an option, mobile tests run on emulators and simulators hosted by Momentic.
Instances are provisioned on demand, typically boot in under a second, and each
test gets a fresh instance so state does not carry over between runs.

* **Android**: remote emulators provisioned by Momentic. See
  [emulators](/platforms/android/emulators).
* **iOS**: remote simulators provisioned by Momentic. Real devices are not
  supported. See [simulators](/platforms/ios/simulators).

Pick remote or local per test through the **Region** dropdown: any Momentic
region selects remote, `Local` selects local.

### App assets: channels and tags

Remote emulators and simulators install your app from build artifacts organized
into **channels** (release environments like `dev`, `staging`, `production`) and
**tags** (versions within a channel). A single channel/tag pair can hold both an
Android APK and an iOS `.app`. Upload from the Momentic dashboard's Assets page
or with
[`momentic-mobile assets`](/cli-reference/momentic-mobile/commands/assets).

### Regions

Set the **Region** in each test's settings to choose which remote region runs
it. If unset, Momentic picks the region closest to the caller's IP.

## Running locally

Running on your own machine is the default: a local browser for web, a local AVD
for Android, or a local Xcode simulator for iOS (macOS only). Local runs are
useful for fast feedback while authoring. See
[running locally](/running-tests/running-locally), and the
[Android](/platforms/android/emulators) and [iOS](/platforms/ios/simulators)
pages for the local setup of each.

## Next steps

<CardGroup cols={2}>
  <Card title="Browsers" icon="chrome" href="/platforms/web/browsers">
    Supported web browsers and runtime overrides.
  </Card>

  <Card title="Android emulators" icon="android" href="/platforms/android/emulators">
    Remote and local Android emulators.
  </Card>

  <Card title="iOS simulators" icon="apple" href="/platforms/ios/simulators">
    Remote and local iOS simulators.
  </Card>

  <Card title="Run in CI/CD" icon="play" href="/running-tests/ci/github-actions">
    Run tests on every commit and pull request.
  </Card>
</CardGroup>