Here is some useful Mobile App source for Tourist Guide. They are for iOS and android.
City Guide Android App
City Guide provides updated and in-depth City information round the clock on your Android Mobile Phone.
Tourist Guide App Template with AdMob
CityGuide iOS Template v.2.1
City Guide – Map App for Android
City Guide – Sleep, Eat, Enjoy
Get real time data for hotels, restaurants, bars and clubs.
City Guide Android Application
Wheres My Places