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TomTom has released an update to its iPhone app, bringing the version to 1.6 and enhancing it with Map Share capabilities, which enable users to apply verified crowdsourced corrections to their map.
Users can also make changes to their maps themselves by editing street names, setting driving directions, as well as blocking and unblocking streets, and share those changes with the TomTom community. As far as updating frequency goes, the app checks for new Map Share updates automatically every week or on-demand.