Centering you can see.

Photograph a single stamp on a dark, even background. Stamp Grader measures how evenly the design sits in its margins and shows its work. It runs entirely on your device: the photo never leaves your phone.

No stamp handy? Try an example

• Dark, matte background (a stock page works well)
• Shoot straight down, even lighting, no glare
• Rectangular stamps are measured today; other shapes are recognised and declined honestly