The San Francisco-based Gametime ticket exchange offers a mobile iOS app for fans to purchase tickets up to an hour after the game starts and use their smartphones to gain admission. "What we're seeing here is a shift toward the last minute," says Gametime CEO Brad Griffith. "When you think about Uber and Lyft, they've really grown that market for transportation. Gametime wants to make that sort of impact" for sporting events. Gametime's app includes photographs of the seating view, the real-time price, and an expedited transaction process. Griffith says the offering should be particularly appealing to fans willing to go to a game at a moment's notice. "Maybe you're at a bar in Wrigleyville, you're about to watch the game on TV, you pull out Gametime and say, 'Hey, we could go in for $10,'" he notes. "You can just buy [tickets] on your phone and walk in and it all happens all within a few seconds. It's about making people more spontaneous and having more fun." Gametime has extended its mobile ticket exchange platform to 30 markets since the initial launch in San Francisco about two years ago, and Griffith says its March sales in Chicago are forecast to be up 500 percent year over year.