APPLE INSIDER
Camo is a new app for iPhone and iPad that allows you to repurpose your mobile device’s camera as a pro-quality webcam for your Mac that works with all your favorite applications.

Camo is very easy to set up and with several nice touches along the way. When launching the app on our iPhone or iPad, it tells us to connect to Camo for Mac, and includes a quick link to AirDrop the app’s download URL to a Mac in one quick step.
Source: APPLE INSIDER