Disclaimer. Screen size and lighting strongly affect this activity. It is for fun and practice only. Full disclaimer

Spot the Difference

Find every change between two scenes.

Start testUp to 3 minutes · demo and practice first

What it measures

How many changed regions you find between two otherwise identical scenes, and how long it takes.

DurationUp to 3 minutes

Format1 starter scene with 6 changes

Device and setupLarger screens make this easier. Mouse or touch.

Accessibility limitsRequires detailed visual comparison. A keyboard region mode is planned but not yet available.

Free resultChanges found out of 6 and elapsed time

PrivacyYour answers are never sent to advertisers. Signed in, your results are saved to your account.

How it is scored

Each changed region counts once. Wrong taps are recorded but not penalised. Elapsed time is shown alongside.

Starter content, version 1. Difficulty is provisional until pilot data supports it. Full methodology

What Premium adds

Scene accuracy and miss map. One upgrade covers all ten tests. See Premium

Limits

Screen size and lighting strongly affect this activity. It is for fun and practice only.

For education, entertainment and general self-exploration only. These activities are not medical or psychological assessments and do not diagnose, prevent or treat any condition. Results are estimates of performance on these tasks and can be affected by practice, attention, language, your device and your surroundings. If you have concerns about your thinking, vision or hearing, consult a qualified healthcare professional.