The service was launched in March for Android, with a beta program for iOS developers. It allows apps to parse location coordinates and display human-readable place names.
The Places API for iOS brings all the features of its Android version, including a drop-in place picker widget, the ability to pull in place names and detailed location info, as well as autocomplete in search and the option for users to add new places.
➤ Oh, The Places You’ll Go! Announcing the Google Places API for iOS [Google Geo Developers Blog]