Actually iOS is based on unix and you can get access to system with jailbreak and do a lot of interesting stuff. For example one of the really popular TMO users added support for android wearables for iPhone before it was released officially by Google :P
And if you say that he publish app to Stroe, you should remember that there are a lot of API limitations for Sailfish store even with available APIs :P
You can call me troll or that I'm bashing, but there are more than enough reasons for that....