About Gallery
From the developer's description on Google Play.
Meet Gallery, a smart, light and fast photo and video gallery built by Google to help you:
✨ Find photos faster with automatic organization 😎 Look your best with editing tools like auto-enhance 🏝️ Use less data - works offline, all in a small app size
AUTOMATIC ORGANIZATION
Each night, Gallery will automatically organize your photos to group by: People, Selfies, Nature, Animals, Documents, Videos and Movies. Gallery helps you stay organized, so you can spend less time scrolling for that photo of your friend or family member, and more time sharing memories with them.*
AUTO-ENHANCE
Gallery has easy to use photo editing tools, such as auto-enhance which will make your photos look their best with one-tap.
FOLDERS AND SD CARD SUPPORT
Use folders to organize photos in any way you want. All while still being able to view, copy and transfer to and from SD Cards, easily.
PERFORMANCE
Gallery comes in a small file size which means even more space for your own photos. All while using less memory on your device - so it won’t slow down your phone.
WORKS OFFLINE
Optimized to work offline, Gallery can easily manage and store all your photos and videos without using up all your data. *face grouping not currently available in all countries