Google is shutting down the Google+ Local app for iPhones on August 7th, 2013. Despite being a popular product, Google is already redirecting people trying to download Google+ Local app to the Google Maps app instead.
The Google Maps mobile app has the same features as Google+ Local and more. Streamlining to Google Maps mobile makes more sense since it is used much more regularly than Google+ Local. The switch over provides a more interactive experience, similar to what the New Google Maps has done for the online browser experience, since all the features of Google+ Local is available on Google Maps plus the ability to add photos.
Android users have nothing to worry about as Android is already a Google platform with Google Maps. In addition to Map, Directions, and ability to Call, users can write and look at reviews, see popular things people are talking about in regards to businesses, Street View, and photos.