Hi, if you read Guidelines for Using Apple's Trademarks and Copyrights you can see next:"2. Compatibility: Developers may use Apple, Macintosh, iMac, or any other Apple word mark (but not the Apple Logo or other Apple-owned graphic symbol/logo) in a referential phrase on packaging or promotional/advertising materials to describe that the third party product is compatible with the referenced Apple product or technology, provided they comply with the following requirements. b. The Apple word mark is used in a referential phrase such as “runs on,” “for use with,” “for,” or “compatible with.”"I think this means that any developer can use words "for iMessage", "for iPhone" etc.