So far, I have not done very much for iOS, however I have made a free store for sideloadable apps (my store also features scanable QR codes to download these apps). I also have written an extremely basic guide on jailbreaking modern iOS versions. Lastly, I have made a cydia repository where I host packages that aren't otherwise easy to find. I hope to do more for iOS in the future, partially because of the potential, and partially because I have a good test device (iPhone 7).