What iPhone map app can work offline?

I'm going on vacation abroad, and I'm gonna need maps loaded on my iPhone 4. Having known that the native Maps app on iPhone doesn't load maps without Wi-Fi or without cellular data (which is expensive abroad), I need an app that can have maps loaded. I know Maps can have the whole route loaded but not zoomed in, but when it comes to cities, it is necessary to have a map that loads when you zoom in, to see intersections and such.

You can try,

Galileo Offline Maps

https://itunes.apple.com/...45474?mt=8

OffMaps

http://offmaps.com/ or

Best Travel

http://besttravelapp.org/

There's also a Google 'Ok Maps' feature which will enable you to use cached maps which a specific area, has a disadvantage that you have to get connected to internet for directions, for that feature you must simply zoom in and zoom out in that place on maps, type 'om maps' in search bar and the place is cached for using without internet

http://www.iphonehacks.com/2013/07/how-to-save-offline-maps-in-google-maps.html

Apple's new iOS 6 Where maps support automatic offline.

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