Solitaire on the phone

On every phone I have ever owned apart from my first phone, I always put a card game on it. Card games are not very demanding, they don't need very much graphics or computing power to run. 

This is the card game on my current phone...

I play it when I have to wait or just want to sleep. When the cards are moved they make a crude card sliding sound effect. Solitaire is a puzzle card game and the aim of the game is to sort all the cards into type and ascending order while following the rules. If you want to know the rules, look it up. I use just one thumb to manipulate the cards.