Find Differences Games is a very popular game. Over 100 million users in the world
With this item, you can create unlimited level, unlimited category (xCode 6.1 project – objective-C)
Can make money with admob and iAd
Check on itune for game with category:
https://itunes.apple.com/us/app/best-find-differences/id931984737?mt=8
Check on itune for game with singe category:
https://itunes.apple.com/us/app/find-differences-8-food/id951650404?mt=8
Check on google play with huge download:
https://play.google.com/store/apps/details?id=com.pineconesoft.comparator