Combine a handful of photos into one picture — a clean grid or a strip, ready to post, print, or send.
Each photo is centre-cropped to fill its cell, so mixed shapes (portrait phone shots next to landscape ones) line up in a tidy grid instead of leaving ragged edges. The output is 1400 px on its long side — plenty for posts, messages and small prints. Photos are combined on the device; nothing is uploaded.
What if photos are different shapes? That is the normal case, and the reason for centre-cropping: every cell is the same shape, and each photo is trimmed symmetrically to fill it. Faces near an edge can be trimmed — leave margin in important shots.
How many photos fit? Two to nine. Beyond nine, cells get small enough that a slideshow or album serves the pictures better.