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In this guide, you’ll learn how to:
  • Build and download your app for testing
  • Trigger a new build when your app changes
  • Understand and recover from build failures

Before you begin

Before you start, make sure you have:
  • An existing project in Rocket
  • An Android test device or emulator (iOS support is coming soon)

Android (.apk)

1

Open your project

From your project dashboard, click Launch in the top-right corner.
Rocket project dashboard showing the Launch button in the top-right corner.Rocket project dashboard showing the Launch button in the top-right corner.

Launch your project

Success check: A popup appears with Android and iOS options under Install on Phone.
2

Start the Android build

In the popup, select Android and click Build.
Android build option selected with Build button visible.

Start build for Android

3

Track the build progress

When the build starts, you’ll see a progress indicator.If the build takes more than a minute, Rocket will email you a download link as soon as it’s ready.
Progress indicator during Android app build with message about email notification.

App build in progress

4

Download your app

When the build finishes, the Download button becomes active. Click it to download the .apk file to your device.
Active Download button available after successful Android build.

Download the .apk file

5

Rebuild or redownload

Need to test the latest changes? Click Build new to trigger a fresh build.You can also re-download a previously generated build from the same popup.
6

Fix build errors and retry

If your build fails, you’ll see an error message with a Rebuild option.
Build failed message with Rebuild button shown.

Build failed with retry option

You’ll also receive an email if the build fails.
Troubleshooting:
If the build still doesn’t work, it could be due to:
  • Version mismatch in dependencies
  • Unsupported or broken packages
  • Invalid project configurations
  • Errors in your code
  • Poor network connection during build
Try this first:
  • Fix any project errors shown in your editor or console
  • Confirm you have a stable internet connection
  • Click Rebuild to start a fresh build
If it fails three times in a row, reach out to [email protected]. We’ll help you sort it out.

Got your app downloaded?
Here’s how to install it on your Android device.

iOS (.ipa) – Coming Soon

Note: App downloads are available to paid users only.

You did it!

Your Rocket app is built, downloaded, and ready to test. Sideload it onto your Android device or emulator and start exploring.
Need help?
Email us at [email protected] or join our Discord community to get help, share ideas, and connect with other creators.