About Spot the Difference

Why this site exists

Spot the Difference is a focused puzzle site for people who want a complete game immediately. There is no long registration wall before the first round, no tutorial to read before the pictures appear, and no forced ad break in the middle of a puzzle. The home page puts a playable board in the first screen, the puzzle library is one click away, and every round gives you two aligned pictures to compare.

The site is built around one simple promise: when it says a puzzle has a certain number of differences, that number comes from the same difference data used to validate clicks. You should never finish a round wondering whether an invisible object was still missing.

What each puzzle includes

Every published level contains:

1. An original picture and a changed picture with the same dimensions.
2. Verified clickable areas for every intended difference.
3. A visible counter that advances when a correct area is found.
4. A timer, miss counter, and three hints.
5. A zoom mode for small visual details.
6. Replay so you can try the same puzzle again and measure improvement.

The game accepts clicks on either picture. That matters on mobile, where one picture may be easier to inspect than the other depending on the scene and screen orientation. A correct click marks the same difference on both images, while a wrong click adds a short time penalty and shows a miss indicator. This keeps the rules easy to understand without removing the challenge.

How difficulty works

Difficulty is tied to the number of verified differences rather than a vague subjective label. Easy puzzles contain up to five differences, medium puzzles contain six to eight, and hard puzzles contain nine or more. Larger scenes can still feel more difficult because the changed details may be smaller, more numerous, or placed in visually busy areas, but the count gives you a reliable starting point.

The timer also includes a small penalty for incorrect clicks. You can play quickly and accept misses, or search carefully and preserve a clean score. Hints reveal a search area rather than the exact shape, so they narrow your attention without solving the round for you.

Designed for desktop and mobile

The board is designed for both mouse and touch. On a desktop, the two pictures appear side by side and the hover magnifier enlarges the area under your pointer. On a phone, the board uses a compact layout that keeps the two versions visible while preserving the same clickable zones. No special app download is required.

Because progress for an unfinished browser session is stored locally, you can leave a puzzle and return without losing the differences you have already found. Closing the browser or starting a new session begins fresh.

The daily challenge

The daily challenge gives everyone the same puzzle for the same date. It is a small way to turn solitary picture hunting into a repeatable habit: play one round, finish all verified changes, and keep your local streak alive. The challenge is still free and does not require an account.

Content standards

We want the puzzles to be clear, fair, and safe for a general audience. Before a level is published, it is checked for image alignment, duplicate or accidental difference areas, unreasonable noise, and a consistent total difference count. The editor can remove a mistakenly detected area or adjust its clickable radius, but a puzzle must contain at least one verified difference before it can be saved.

We do not publish a level merely to increase page count. New pages are added when they provide a usable, complete round rather than a thin template with the same image and a different title.

Accounts and personal data

You can play without creating an account. Google sign-in is available for people who want a recognized identity and access to account features, but the public game pages do not require it. Local gameplay progress and daily streak information remain on your device. For more detail about cookies, analytics, account data, and your choices, see our Privacy Policy.

How the site improves

Improvements are driven by real play behavior and user reports. We monitor whether players can finish puzzles, where the interface may be unclear, and whether mobile layouts remain readable. Changes are then kept small and testable: stronger canonical URLs, clearer rules, faster image loading, better 404 recovery paths, and more informative puzzle pages.

If a puzzle feels unfair, an image does not load, or a click zone seems wrong, a report is genuinely useful. You can send details through our contact page, and we can use the puzzle number to inspect the exact level.

Contact

Questions, bug reports, and puzzle suggestions are welcome. See the Contact page for the support channel and the information that helps us investigate an issue quickly.