We’d love to be on iOS!
But there are many reasons that impede us creating a port for iOS:
Our application is licensed under the GPL, The GPL license is in conflict with the terms of the App Store. Many GPL applications have been pulled out because some organizations denounce them to Apple (just like VLC Player was pulled out)
A file sharing application like ours has very little chance of being accepted in the App Store.
We’d have to code everything again using Objective-C, this would take a long time to happen, and for the 2 reasons above our little team has preferred to create FrostWire for Android instead (almost the same technology and no issues with the Android market)
We do see the many users that come to our site with iPhones, iPods and iPads, and it sucks we’re hands tied.
We’re thinking of implementing a light version (no bittorrent), only to share files between FrostWire for Desktop and Android over Wi-Fi.
That would probably be accepted on the iTunes AppStore....