Apple Chief Financial Officer Peter Oppenheimer said 80 percent of all iOS devices have now upgraded to iOS 7.
Oppenheimer made the comment on a conference call to analysts on Monday following its fiscal first-quarter results.
The latest version of iOS was met with mixed reactions due to the radical changes of the design, which opts for a more flat, minimalist view favored by Apple design guru Jony Ive.
That so many iOS devices are on iOS 7 makes it easier for developers to create apps for the platform. It's one of the major advantages touted by Apple.