Thread:Ultimate iPad Expert/@comment-14310002-20140918023523/@comment-24886041-20140922162628

Hi Danial,

If you're using a legitimate key to sign an IPA, it needs to be a key signed by Apple. They charge $99/year for this service (and provide the rest of the resources too).

Otherwise, you need to self-sign, but then the IPA will only run on your own devices. And to self-sign, you need XCode, which requires OS X.

Your other option is to jailbreak and use the cydia dev tools, which don't require signing -- which is of course much less secure.