Apple and social networks are under fire for distributing several social media apps through Apple’s iTunes store that harvest iPhone contact information without users’ permission.
iPhone apps from social networking sites – including Twitter, Facebook, FourSquare, Instagram, Foodspotting, Path and Yelp – are reported to access the iPhone address book.
In a letter to Apple, two US congressmen have called on Apple to explain why it has not blocked the apps, which violate Apple’s user guidelines.
The Apple guidelines say: "Apps that read or write data outside its designated container area will be rejected." They also say: "Apps cannot transmit data about a user without obtaining the user's prior permission."
The social networking apps' practice was discovered by an app developer in Singapore who noticed his contacts had been copied from his iPhone address book, without his consent, by a social network called Path, according to the BBC.
Dave Morin, chief executive of Path, issued an apology in a blog post and said the social network would ask users to opt in to share their contact information.
Apple said in a statement: “As we have done with location services, any app wishing to access contact data will require explicit user approval in a future software release."