When Apple had launched the 3GS, the phone was missing the integral part (IMO) which was turn by turn maps. Finally a company (Navigon) appeared and all seemed to be well. After owning the app for over 3 years, I have to say Im extremely let down. Their interface update for iOS 7 is very lackluster and the absolute BIGGEST problem is address entry. OS integration would have been nice too. Sadly Im still currently running on an iPhone 4 but Id rather use google maps than deal with the headache of entering separate pieces of address info and having a clean cut interface than deal with the headache which is Navigon.