Apple's maps have turned out to be a hit with iPhone and iPad users in the US - despite the roasting that they were given when they first appeared in September 2012. But Google - which was kicked off the iPhone after it refused to give Apple access to its voice-driven turn-by-turn map navigation - has lost nearly 23m mobile users in the US as a result. That is a huge fall against the 81m Google Maps mobile users it had there at its peak in September last year, according to ComScore, a market research company, which produced the figures from regular polls of thousand of users. The introduction of Apple's own maps with its iOS 6 software in September 2012 caused a furore after it emerged that they were littered with errors. A location in Ireland named "Airfield" was marked as an airport, Paddington station had vanished, and Helsinki railway station was - it seemed - a park.