[Free, ad-supported] REAL multicam for newer iPhones or iPads (iPhone SE2, XS, XR, 11, 12 and iPad Pro 3rd Gen).
SIMULATED dual cam for older devices (iPhone X, 8, 7, 6S, SE).

The ULTIMATE DUAL/TRIPLE CAM app. Take LIVE PHOTOs and RECORD videos using any combination of these in picture-in-picture layout:
1. Front camera
2. Back camera
3. Photonu camera of another iPhone thru peer connection

You can:
◆ Choose split layout or picture-in-picture
◆ Move inset camera by dragging to desired position
◆ Temporarily pause video feed from front or back camera
◆ Tap to adjust focus, double tap to adjust exposure as well
◆ Toggle picture-in-picture, even while recording
◆ Pinch to zoom
◆ Use the stock Photos app to properly share Live Photos

See THREE CAMERAS AT ONCE--back, front, and peer--ALL IN ONE PHOTO OR VIDEO.

NOW no one is left behind. No need for awkward selfies. Everyone is in the picture. Download and ENJOY!