You can either use the export options of Cadrage’s gallery and send them through Airdrop (select “More” when asked where to export) or upload them to your Dropbox or any other Cloud file storage.
Alternatively, it is possible to transfer them through iTunes:
Connect your iOS device to your computer and select it in iTunes.
Click on File Sharing on the left and then click on Cadrage in the app list.
Select the photos and video you would like to transfer and click Save As.