Keeping score on the links with friends can be difficult, especially 'cause Joey won't stop sticking everyone's little pencils up his nose and pretending to be a walrus. Keep things clean, with GolfMoolah.
Effectively making golf paperless, Moolah tracks scores and debts across holes, is outfitted with classic and novel betting games/modes, and rocks brand new handicap-calculating capabilities so you can "focus on the game, not the math", though for that one cool teacher who uses algebra to impress chicks, they're already one and the same. Using the virtual scorecard is easy: choose your course (par/yardage for most come pre-loaded), select one of ten games, and input wager(s)/player names/handicaps, then record strokes at each hole, and dual screens will simultaneously track handicap-adjusted scores and automatically calculated winnings, both of which can then be e-mailed for PayPal collection -- though if they were really pals, they wouldn't be weaseling out of paying cash. While it's got all the standards likes Skins and Nassau, this puppy'll also encourage lesser-known wager wars like the side-betting "Snake", with the reptile (the last to three putt) paying out each hole until someone new takes the dishonor, and "Thirty-Two" (where a challenged player pays out if he can't make a three putt), which can be proposed/started mid-round -- coincidentally, a great time to bet anyone anything.
While you can manually add (and save) your own courses, the app comes standard with every USGA registered course in the country (~18,000), even the old-fashioned ones that frown on fooling around, and don't allow in anyone without a Cox.