SherlockForms vs Find Odd One

This little game is geared towards visually impaired children. The player is tasked to find a specific shape in a set of various other shapes. Over the course of the levels the shapes get smaller and smaller. The intention is to enable a supervisor to more easily asses the child's approximate visual acuity; all the while keeping the child entertained.

Every board in Find Odd One is a grid of matching tiles with exactly one that differs, either by color, by shape, by angle or by size. Tap that tile as fast as you can. The main mode is a 60-second test. Each correct tap brings a fresh board, and when time runs out you see how many boards you found, how many misses you made, your average find time and your accuracy. Your rank comes from boards found minus half your misses, and the result card shows the point range behind each rank. Grids go from 3×3 up to 7×7. Practice mode has no timer, so you can warm up on a larger grid before a timed run. If a call or a notification pulls you away during a run, the clock stops. When you come back, a short countdown starts and a new board appears with the time you had left. After a test you can open a card that splits your time by type of difference, so you can see whether color, shape, angle or size slows you down compared with your recent tests on the same grid. Your last 30 tests, your best score for each grid size and a chart of recent scores are kept on your device. Find Odd One can be used in English, Korean, Japanese, Simplified and Traditional Chinese, Spanish, French, German and Portuguese.