Going to the ball game is wickedly expensive, which is probably why aftermarket ticket services are flourishing. But they're not exactly intuitive: you have to deal with shipping or meeting the seller in person, which is often a huge barrier if you're strapped for time. Enter Gametime, an app previously limited to iOS, which tries to combine great deals on last-minute ticket sales with a friendly, mobile-focused interface.

Here's the gist: sports venues have unsold tickets to a game, which the Gametime app features with significant discounts, "up to 80% off."