If you install an app from WebCatalog’s directory, the icon is managed by us and updates automatically when the developer changes their branding.
If you want to use your own icon, you can create a custom app by following this guide: How to create custom apps
To make it easier, you can quickly create a custom app from any existing app in the catalog:
Click the three-dot menu on the app card.
Select Create custom app.
WebCatalog will pre-fill all the app info—just update the icon (and anything else you’d like).