# Update your app

When maintaining your app, you might need to apply changes or create a new app version.

The process is different between [private/public apps](/custom-apps-documentation/app-maintenance/updating-your-app/private-public-apps.md), and [approved apps](/custom-apps-documentation/app-maintenance/updating-your-app/approved-apps.md).

## Changes and versioning in private/public custom apps

All changes take effect immediately in running scenarios with [private and public custom apps](/custom-apps-documentation/app-maintenance/updating-your-app/private-public-apps.md). You should take this into account while changing your code.

## Changes and versioning in approved custom apps

Every change made to your [approved custom app](/custom-apps-documentation/app-maintenance/updating-your-app/approved-apps.md) is visible only to you unless we commit it. You can safely add and test new functions and, when they are stable, you must contact us to check and release your updates to users.


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