What apps can make living in New York easier?

My sister is moving to New York in a few weeks. She has never been and is somewhat intimidated by the whole change. What can make the transition easier? Ipad or iphone apps are the things I'm actually looking for. Maps, restaurants, discounts, anything goes. Anything you think that will make life easier there?

There's a bunch on the MTA website here: http://www.mta.info/apps/

Menupages (restaurants) has one… Https://itunes.apple.com/us/app/id586374537?mt=8

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