> ...In the absence of a separate written agreement to the contrary, Apple will be free to use any information, suggestions or recommendations you provide to Apple pursuant to this Agreement for any purpose, subject to any applicable patents or copyrights.
Informally, it's getting 'Sherlocked' and this has been happening for years. From the moment you sign-up to the App Store as a developer, there is nothing that can stop Apple from competing with your ideas. [0] Another excerpt from the terms and conditions about competition:
> Nothing in this Agreement will impair Apple’s right to develop, acquire, license, market, promote or distribute products, software or technologies that perform the same or similar functions as, or otherwise compete with, any other products, software or technologies that you may develop, produce, market, or distribute.
This enables Apple to freely lift and integrate features into their OS products and even remove apps that copy their apps or features. Not only it is pointless to sue Apple, it is certain that you will instantly lose anyway.
The only way to compete is cross-platform (Web, iOS and Android), which Apple is poor at. But then again, Google...
[0] https://developer.apple.com/terms/apple-developer-agreement/...