OnLaunch

Swift / Kotlin / Flutter

OnLaunch helps app teams communicate with users at the exact moment they have attention: right after app launch.

OnLaunch gives developers and app teams a simple launch-time messaging layer. When users open an app, you can show important messages before they continue: update prompts, outage notices, maintenance windows, emergency warnings, feature announcements, or commercial messages.

The project includes an open-source web manager plus native clients for iOS and Android. You can host it yourself, use the public OnLaunch app, or inspect the implementation on GitHub.

What it helps with

Encourage updates

Tell users when old app versions should be updated because they might not work anymore.

Handle incidents

Display warnings or temporarily pause access when a bad release, outage, or security issue needs immediate communication.

Announce maintenance

Let users know when planned maintenance affects the product, right when they open the app.

Promote what is new

Use your own app launch moment to announce new features, offers, or important product updates.

Repositories

Web Manager Manage launch messages, organizations and apps from the web. iOS Client Integrate launch-time messaging into an iOS app. Android Client Add the same launch-time messaging behavior to Android. Flutter Client Community-contributed Flutter client for cross-platform apps.