Open one of your timelines and tap the + post button in the lower-right corner.
From the three circular options, select the Then & Now icon—the upper button with two dots connected by curved arrows.
Habident will randomly bring together two photos from different points in your timeline. Swipe through your photos and explore the available gestures to change the pairing, order, and arrangement.
Found a combination you like? Tap the share icon in the upper-right corner to share it.