Yes, you can change your app name or icon, but these changes are not immediate and require an app update. The reason being that these changes are made in the various app stores. This means that your app will have to be resubmitted to the platform operators (Apple, Google, Amazon, etc.) and will be required to go through the approval process again. 

The following changes require an app update: 

Please reach out to submissions@mazsystems.com if you need a new build with updated logos, icons to be submitted.