The collection of iMessage apps is growing and this can make the iMessage app list messy or have some apps that you don't want to use. If so, users should adjust the iMessage app list and delete iMessage apps with apps they don't use. Below is a guide to delete iPhone iMessage apps.
How to delete iMessage iPhone app
Step 1:
On the iPhone interface, click Settings and then click on Applications at the bottom of the list.
Step 2:
Go to the application management interface on iPhone, enter Messages in the search box and then click on the Search application below to perform.
Step 3:
To customize the Messages app on your iPhone, scroll down and tap iMessage Apps to adjust it. You'll then see a list of apps included in your iMessage messages.
Standalone iMessage apps appear at the top, and apps included with iMessage apps appear under Included with Apps. When you delete an app that includes an iMessage app, it's removed from both the Messages app and your home screen.
Step 4:
Tap the red circle button to delete the iMessage app , then tap Delete to execute. Finally, tap Delete to agree to delete the app from iMessage.