SmartShots resizes your screenshots, zipped them and send them to given E-mail address in the resolutions (5.5/4.7/4/3.5 inch) that Apple require in the store.
Save a lot off time by following 5 simple steps instead off resizing your images one by one.
A Cool simple idea: the App Store screenshot resize tool.
Tip: Use github.com/fastlane to upload metadata to itunes full automatic.