I am releasing a standalone iOS messages extension on the app store meaning there is not an iOS app to go along with it. Do I have to include screenshots for the iOS app or can I just add the screenshots for the messages extension?
Thanks
If you don't have an iOS app, how would you add screenshots for an iOS app?
Besides:
For all iMessage apps and iOS extensions, provide separate sets of screenshots of your iMessage content for iPhone 6 Plus and iPad Pro. These screenshots will be used across device sizes. You can upload up to five screenshots per set to showcase the iMessage experience. You will need to upload your screenshots to both the App Preview and Screenshots section and the iMessage section of your app’s version page in My Apps on iTunes Connect. When showing conversations in Messages, make sure the information and accounts you display are not real. Do not display phone numbers. For screenshot specifications, see the iTunes Connect Developer Guide.
Source: https://developer.apple.com/app-store/imessage-app-submissions/