Publishing similar apps is considered spamming. Yet there are valid reasons to develop multiple apps from the same code base. Here is what you need to know to avoid being labeled as spammer by app reviewers.
How to Publish White-Label Apps in the App Store
Being a white-label app vendor in Apple’s store is not easy. App Review could label you as a spammer because of a number of similarly-looking template apps and jeopardize your entire developer account.