I should have thrown a license on this, but it was really just a personal project and never meant it to be released into the wild (GitHub was just a place to store the code)... I suppose I should go back and update this, add a README, and a license.
In contrast, if you had put an open source license on it, then anyone would be well within their rights (assuming the license allows it) to compile and release a version to whatever app store they want.
This is actually potentially untrue, as some versions of the GPL require that the end user must not be restricted wrt the app they download, and that's not compatible with the Apple's store requirements. See e.g. https://apple.stackexchange.com/questions/6109/is-it-possibl...