Google has released a native version of its Maps app for the iPhone

Google's new iPhone app introduces some functionality previously restricted to Android devices.

Features Google has introduced that were not available in its earlier iPhone app include:

• Voice guided turn-by-turn directions, with estimated travel times.

• Indoor panoramic images of buildings that have signed up to its Street View Business Photos service.

• 3D representations of the outlines of buildings that can be viewed from different angles

• Vector-based graphics based on mathematical lines and points rather than pre-created bitmap graphics, making it quicker to zoom in and out of an area.

Among the facilities Google's iPhone app lacks that are present in its Android equivalent are indoor maps, the ability to download maps for offline viewing, and voice search.

Google's iPhone app offers 2D, 3D and street-level photographic views of cities

Google's app allows users to see details and reviews of businesses and view interior photos