I have my e-mail, contacts and calendar in iCloud, but I also use my iCloud account to by apps on my Macbook and iPhone. The rest of my family (my wife and kids) also uses my iCloud account to buy apps, so we only have to pay one time. The big problem is that the password to App Store and my e-mail are the same. So if I want them to use me account to by apps they also have access to my e-mail. Can I have different passwords on my iCloud e-mail and App Store, or what to do?