Differences (Easybrain)

Each level shows two copies of a picture, a bedroom, a street, a meal, animals or people, one above the other. A row of markers at the top shows how many differences there are, often ten, and you tap a spot on either picture to circle a difference on both. A wrong tap costs one of three hearts, and hints point out a difference when you are stuck.

The app holds more than 20,000 pictures, mostly bright illustrations, across easy and hard levels. Daily Challenges add a puzzle for each day that counts toward unique trophies, in the way of Easybrain's other apps such as Sudoku.com and Solitaire, and seasonal events reward animated postcards.

It is free with ads, from Easybrain.