Following what's now known as Mapplegate with Apple's heavily scrutinized Maps App introduced by iOS 6, a developer has created his own maps app predominately based off Google's renowned maps service.
Katsumi Kishikawa has developed a simplistic and straightforward app called Classicmaps, which replaces Apple Maps with a design striking a similar resemblance to the now-removed Google Maps app.
While it doesn't offer notable features such as public transport directions, navigation and Street View, the app is the closest resolution to having a Google Maps app on your iDevice. Or you can settle for the more complete iOS web Google Maps app.
As for Apple's own maps app, it has since shown signs of improvements following an apology letter from CEO Tim Cook.