iMazing (was DiskAid) is the ultimate iOS device manager with capabilities far beyond what iTunes offers. With iMazing and your iOS device (iPhone, iPad, or iPod), you can:

• Copy music to and from any iOS device (even from one iOS device to another!) regardless of what Mac or PC the device is already synced to; it's music copy how you always wished it could be, without limitations or restrictions
  
• Backup & restore individual iOS apps and your custom saved data, perfect for freeing up space on your iOS device without losing your files (or progress in a game) or for copying the app as-is to another iOS device
  
• Transfer files to and from an iOS device, and browse the iOS file system
  
• Use your iOS device like an external drive
  
• Browse and save messages (SMS, MMS, iMessage), voicemails, and call logs, none of which iTunes can do
  
• Browse, save, and add contacts to your iPhone, without automatically adding them to your iCloud account
  
• Manage multiple backups of the same iOS device and restore from any one (similar to Time Machine for iOS)
  
• And other amazing things you never thought possible!
  

Version 1.5.10:

• Improvements in music transfer from iTunes to device
  
• Fixed crashes in iTunes import wizard
  
• Fixed issues when importing contacts to device from a vCard
  
• Stability improvements