eWallet's built-in SyncPro® sync engine (included with eWallet® version 8 for iOS) allows you to sync between supported devices using the cloud. Normally you have the option of having eWallet use either iCloud or Dropbox for the syncing process; however, Apple's new iOS 8 iCloud Drive feature is incompatible with its older iCloud Documents and Data supported in iOS 7. Bottom line: if you have iOS 8 everywhere, you can still use the iCloud option built-in to eWallet; if you have a mix of iOS versions though and have upgraded to iCloud Drive, you'll need to use the Dropbox option.
You now have a master copy of your wallet on Dropbox for future synchronization with this device, and if you like, other supported devices.