I just joined and I think if you use iPhone you need to use iCloud because of the security features in iCloud. If you use Apple devices use iCloud. If you want to use your iPhone with Boxcryptor and you have a iPhone you should use any other cloud provider but iCloud. I have all Apple devices and was wanting to use amazon drive because you get more storage for the money but I don’t think it will work on my iMac. Not sure but what I can tell no.