iOS' market share grew by seven percent in October, according to figures from Net Applications.
October was of course the month that the iPhone 4S and iOS 5 launched, with iOS' market share increasing from 54.6 percent at the end of September to 61.6 percent at the end of last month.
Android's market share also grew, from 16.3 percent to 18.9 percent, while the share of mobiles and tablets running on Java, Symbian and BlackBerry's OS all declined.
Going further back, iOS had just a 46.6 percent share of the smartphone and tablet market back in February this year, though grew 13 percent between March and April, around the time that the iPad 2 launched.
Android's growth has been steady, with month-on-month increases posted every month since December 2010 bar one.
The figures for BlackBerry paint a worrying picture - despite holding steady month-on-month since the beginning of the year, its market share dropped from 3.3 percent to 2.5 percent in the last month, coinciding with a well-publicised outage suffered by BlackBerry Messenger.