What is Webfeud?
Two players play in any game of Webfeud. The object of the game is to score more points than your opponent. Points are awarded by placing words on the game board. Letter vary in value per language. The best score is made with longerwords or letters with more points and thus playing words with high scoring letter combinations.
The app seems to be not updated anymore and it's no longer available for Windows Phone. Last Android version, released in February 2015, can be still downloaded from the Google Play Store.