Shoot in order: front, inside, front, inside… Photos get grouped into cards
using the number above, so keep the sequence consistent.
Tip: a dark surface makes the corners easy to see.
Drag the dots to the card’s four corners.
The filled dot becomes the top-left of the saved image.
This browser can’t open some of these photos — usually iPhone
HEIC files. They’re still saved unchanged, but can’t be previewed or
straightened here. Use JPG/PNG on a computer, or run this on your iPhone where
HEIC works natively.