The objective of iSketch is to score points by guessing words. Each player gets a turn as the "artist", in which he/she draws a word or phrase while the other players attempt to guess it. The artist can use a mouse or graphics tablet to draw, and is given a set of on-screen drawing tools including pens, brushes, an eraser, a fill tool, and a color palette. When another player successfully guesses the word or phrase, both that player and the artist score points. The artist scores additional points for each additional player who also successfully guesses the phrase before time runs out, while each additional player scores one point less than the player before them.