With the release of the BlackBerry Passport at the end of the month, OS 10.3.0 was officially released. This was too late in the month to make too much of a difference, although the majority of 10.3 users are actually not even Passport users, but are running leaked versions of the OS on older phones. With in-market devices not getting upgraded until the release of OS 10.3.1 this November, the uptake of 10.3 is likely to be minimal in October as well.
This data was collected by BlackBerry World for downloads of the free strategy game Pixelated and the free checklist app Stuff I Need. Data shown on the chart is from the beginning of September 2013 through the end of September 2014.