Handoff

Start here, finish there.

An icon alerts you when something is available for handoff.
Pick up where you left off.
When your Mac and iOS devices are near each other, they can automatically pass documents, email, and more from one to the next. Just log in to iCloud on each of your devices.
Work seamlessly.
Start an email on your iPhone, and finish it on your Mac. Or create a report on your Mac, then edit it on your iPad.
Learn which apps use Handoff