I share you my Apk
Installable kitkat 4.4.2 & Lollipop non ROOTE
Apk tested on Galaxy i9505 S4 and S5
Install the apk run once iGO, restart the phone then you will have a folder (Exemple my S4 I9505).
it only remains a place iGO files ([Only registered and activated users can see links. ]).
Warning, if you already have an install iGO, the signature will not work
[Only registered and activated users can see links. ]
Pass = MCC