"Guideline 4.3 - Design
Also, this app duplicates the content and functionality of other apps submitted by you or another developer to the App Store, which is considered a form of spam.
Apps that simply duplicate content or functionality create clutter, diminish the overall experience for the end user, and reduce the ability of developers to market their apps.
The next submission of this app may require a longer review time.
Submitting apps designed to mislead or harm customers or evade the review process may result in the termination of your Apple Developer Program account. Review the Terms & Conditions of the Apple Developer Program to learn more about our policies regarding termination.
If you believe your app is compliant with the App Store Review Guidelines, you may submit an appeal. Alternatively, you may provide additional details about your app by replying directly to this message."