App builder

App name

Enter a name (1–30 characters).

Website URL

Must start with https://

Package ID

Lowercase, dotted, unique per app. Cannot change after publishing.

Use lowercase dotted format, e.g. com.brand.app

OneSignal App ID

Must be a valid OneSignal UUID.

Background color (hex)

Used for the splash background and the app icon background.

Enter a hex color like #477E49.

Logo (square PNG)

Optional. ~512×512 works best.

Logo size on icon — 66%

How large the logo appears on the icon background (like Android Studio's resize).