According to data from mobile and web analytics platform, Mixpanel, iOS 8.4 has reached a 40 percent adoption rate just one week after it was launched on June 30. The likely driver of this impressive start for a point-release, speculates 9to5Mac, is the launch of Apple’s new music streaming service, Apple Music.

Following much hype and anticipation, users who wanted to try Apple Music had to upgrade their iPhone, iPad and iPod touch devices to Apple’s latest iteration of its mobile operating system, iOS 8.4.

The report cautions that the quick uptake of iOS 8.4 is not be mistaken as a reflection on how well Apple Music itself is doing. The jury is still out on that, and with users still in the free three-month trial period, it may take a while before we see how many early adopters stick with the music streaming service.

Image via Mixpanel

Citing 9to5Mac’s own site traffic – iOS 9 is currently the third most popular version of iOS used by its readers – the report speculates that iOS 8.4 could have seen an even higher install rate if it weren’t for the availability of the iOS 9 beta. Although Apple will likely only release the public iOS 9 beta in the second half of July, it appears a substantial number of iPhone and iPad users have already installed the early developer betas.

While Apple Music may be the main reason for iOS 8.4’s impressive install rate, the update also features a revamped and improved Music app along with a number of bug fixes and performance improvements.

By comparison, two and a half weeks after launch, iOS 8 saw only a 47 percent adoption rate. As of June 22, data on Apple’s App Store support page indicate a combined iOS 8 install rate of 84 percent – Apple does not break out numbers for point-versions.

Users who have upgraded to iOS 8.4 will have to remain on that version until Apple releases iOS 9 in the fall; Apple stopped signing the code for iOS 8.3 on Tuesday, preventing users from downgrading using iTunes.

Main image via apple.com