Want to show your loyalty to your national team without getting your pretty face dirty with paint? Then be sure to install Flag Face on your iPhone.

Flag Face lets you capture a photo of yourself (or use an existing one) then apply an image of your country's flag onto the face. There are more than 80 flags to choose from, and the effect itself is impressively authentic.

There's no live preview when editing, but Face Flag is an ideal app for the World Cup, or just to show your allegiance.