your title states "how to get AppCake on ISO 7" , then you clearly state that you have tested this on several devices running ISO 6 ??? ISO 6 is not 7
i have jailbroken my iPhone running ISO 7.0.4 its working well and i have yet to find any version of AppCake that supports ISO 7 , Any that are there to download all state when on the "confirm" screen the following packages will be installed :
AppCake
AppSync for ISO 6
Mobile Substrate
Substrate Safe Mode
These are all for ISO 6 NOT 7
This is why i will not install AppCake just yet.
I have how ever installed "ZEUSMOS" and have been successful in