Escoba de 15!
iOS Universal Games
Escoba de 15 is a variant of the Italian card game Scopa. In this version the players needs to sum 15 points to capture the cards.
The game is usually played with a deck of traditional Spanish playing cards.
The app has a resume of the game's rules, and supports global GameCenter leaderboards.
It is a very good tool to improve the mathematical skills in a funny way!