Google has released a native version of its Maps app for the iPhone.
It follows Apple's switch to its own map software which stopped Google powering the handset's default app.
The move was widely criticised after numerous mistakes were found in Apple Maps' search results.
The BBC's technology correspondent Rory Cellan Jones explained to the Today programme's Sarah Montague that Apple "had no choice" to let Google back on to the iPhone.
He went on to add that the introduction of Apple Maps "has caused ruptures at the company".
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