OS: iOS and Android
Price: Paid/free
Developer: Engaging Games
Type: Game - Arcade
Monetization: Advertising, In-App purchases, paid app.

Such a fun game for any age. The type of game you will not uninstall but rather keep on your phone and come back to every now and then, Great colors, clean design... everythnig a good app needs.

Only problem I see here is the price ($2 for iOS). This app can make enough revenus from ads and in-app purchases.

Overall, a good inspiration for anyone interested in short and simple games for the general population.