The majority of developers are working on an iOS 7 update for their apps, and that, of those updates, more than half will drop support for iOS 6 and older.

That's according to a survey of 575 Apple developers carried out by The Iconfactory's Craig Hockenberry, the developer behind Twitterific. Hockenberry says on his blog that he is in the middle of an iOS 7 app update himself, and that it requires "a lot more work than previous versions of iOS… But the results are stunning."

While working on his app update, Hockenberry decided to reach out to other developers and find out whether they too are working on an iOS 7 update ready for the launch of the new operating system later this year.

His survey found that, of the 575 responses, 545 developers said that they were working on an update for iOS 7. That's a total of 95 per cent. Of those, more than half (52%) said that they would be dropping support for iOS 6 and older with their iOS 7 update.

The survey suggests that many apps will be ready to roll out on iOS 7 soon after it rolls out to iOS devices. However, as Hockenberry highlighted, those on older devices that will be unable to run iOS 7 such as The iPhone 3GS and the original iPad might want to consider upgrading their device soon, as iOS 7 could mean that more than half of apps no longer work on older operating systems.

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