Off By One: Spot The One

Among a neat grid of geometric shapes, just one is slightly off.

There is no timer. No hurry. Just a quiet moment of seeing.
On the train, between tasks, before sleep —
a small ritual to bring your focus back.

■ 35 stages, 3 difficulty modes
Stages 1–20 use a 4×4 grid. Stages 21–35 use a 5×5 grid.
Each stage consists of 5 puzzles.
Choose Easy, Normal, or Hard to play at your own pace. The leaderboard ranks Hard only.

■ Endless mode
4×4 Hard. The puzzles get harder as you go. One mistake ends the run.
A separate Game Center leaderboard tracks your best streak.

■ 10 shapes
Triangle, square, diamond, pentagon, circle, ellipse, hexagon, octagon, star, hexagram.
Each with its own kind of nuance to spot.

■ 6 dimensions of difference
Size, position, angle, thickness, count, edge length.
One shape, just slightly off.

■ No timer, no pressure
Observe for as long as you like.
The difference reveals itself to the patient eye.

■ 100-point scoring
A clear deduction system based on misses and time.
Clear in 20 seconds without mistakes for a PERFECT badge.

■ Serverless. No account.
No network calls. No login required.
Everything stays on your iPhone.

■ Privacy
No personal data is collected.
All stats are stored locally on your device.

■ Pricing
Free to play, 10 plays per day.
Watch a short ad for extra plays.
Daily missions grant bonus plays when completed.

For the small pauses in your day.