The easiest and most popular way to transfer/sync app data between one iPhone and another is to use Apple’s iCloud. However, while this method is easy, it isn’t available to everyone – to use iCloud syncing, the developer of the app/game has to add iCloud backup support first.
Also asked, can I transfer an app from iPhone to iphone?
Using iTunes backup to transfer Apps from iPhone to iPhone is a process of backup and restore. Click Summary, and then choose Back Up Now. This will transfer all your old iPhone data to iTunes backup, including Apps. Or you can choose to Transfer Purchases to only transfer Apps, music, etc.