Material Gallery is a collaborative tool for uploading design work getting feedback and tracking revisions – quickly and efficiently. This companion app lets you review share and leave feedback on design work right from your phone.

REVIEW DESIGNS ON YOUR PHONE
Gallery allows teams to review designs on mobile devices on the go.

CAPTURE WORK FROM EVERYWHERE
Quickly upload screenshots mockups and photos of sketches or whiteboarding sessions.

LEAVE FEEDBACK ON YOUR TEAM’S DESIGN
Gallery makes it simple to capture contextual feedback on any image so you can gather and respond to feedback easily.

Product website: https://material.io/tools/gallery