I have it on my iphone, but there's virtually no practical use for it. The previous poster pointed out that boarding buses within WDW is incredibly easy. This is even more the case once you've already gotten on property and within a park. Also, the app lists a schedule with times on it. There's no way that a bus system as massive as WDW's and with as many routes as they run is going to perfectly match a timed schedule like the app shows. Maybe the frequency would be close, but no way on the ETAs. Also, it shows some bus routes that I'm not sure exist, due to some places being within walking distance of destinations. I have it on my phone simply because I'm a Disney nerd.