iOS 8 launched almost three weeks ago, and nearly half of active iPhones, iPads, and iPod touch music players upgraded within a week of availability. While the quick adoption rate might have seemed impressive at first — especially compared to rival Android software updates — iOS 8 installs appear to have stalled significantly recently. Apple’s own App Store support page reveals that 47 percent of all active devices are running iOS 8, an increase of only one percentage point from two weeks ago.

There’s no obvious reason for the slow down in adoption, but a botched iOS 8.0.1 update may have put people off upgrading, alongside huge storage requirements for iOS 8 which have prevented many 16GB and 8GB iPhone owners from updating without deleting photos and apps or using iTunes to install the update. Apple also dropped support for the iPhone 4 with iOS 8. MacRumors reports that iOS 7 adoption was nearly 70 percent just 20 days after its launch last year, so Apple clearly has a long way to go to match the same pace with iOS 8. That could improve with the upcoming iOS 8.1 update that brings Apple Pay support and SMS syncing with OS X Yosemite, but if it doesn’t then Apple might have to try more creative ways to force people to update to avoid any future fragmentation.