501 Scoreboard is designed to take all the hassle out of keeping track of score for those of us who don't have a digital dart board. No math necessary the app does it all for you so you can just focus on your game. Simply enter in the scores for each player's three throws (for doubles and triples use the check boxes next to score field) then hit subtract and the player's set is tallied up and subtracted from their remaining points. Why use a pen and pencil and slow down your play time? Just use 501 Scoreboard instead. Less math, more darts. no brainer. Added scoreboard for cricket-Added scoreboard for Bermuda Triangle.