Xilitheme-select provides an automatic selection of themes : one for current browsers and another for iphone/ipod touch browser (and more).
Verify that the folder of this theme has a right name with right extension.
It is an easiness to choose a theme with a folder without the proposed file extension.
A lite release of a theme is here. (this theme now contains accordion features for categories list and is ready for multilingual website with plugin xili-language)
iPad's Browser is very very similar to current Safari. So we decide yet to not add it in list. But it possible to modify var in top of class.