Apple has a portal for developers to file complaints about other App Store apps infringing their intellectual property (IP) rights. This form says that Apple will follow-up via email, and put the two developers in contact.
Apps on the App Store are made available by third party providers. Once you have identified the app and described the alleged infringement on the following pages, we will respond via email with a reference number and will put you in direct contact with the provider of the disputed app. Any further contact with the App Store Legal team should be made via email and should include the reference number in the subject line.
Yesterday, developer Benjamin Mayo noted that Apple may have begun rejecting apps that violate other’s intellectual property. For example, an app that mimicked the popular to-list software Clear, was apparently rejected because it could mislead people looking for the original Clear app.
For those affected prior to Apple’s apparently new rejection policies, this form should be of some help for you.