Compare the left (original) and right (compare) images
Tap on a difference to mark it
Find all differences before time runs out to clear!
Spotting Differences
You must tap on an actual difference. Tapping identical areas counts as a wrong answer.
Systematic Scanning
Divide the image into sections and scan each one in order for more efficient searching.
Completed Example
Tip
Divide the image into top/middle/bottom and scan systematically
Pay attention to changes in color, size, and position
Use hints when stuck to reveal the area of a remaining difference
Visual comparison tasks train processing speed and selective attention. The ACTIVE study found similar visual training reduced dementia risk by 25% over 20 years.