Apple reported today that it had 190M icloud users. This means that it has grown by 40M users since July of this year, when it said it had 150M users. That marks 21% growth in users of iCloud. Since the previous measurement was 125M users in April, that was a 20% growth.
So the rate of growth of iCloud users remains nearly constant across the last two quarters. Apple CEO Tim Cook announced in February that iCloud had over 100M users. In January, he said that the service had 85M users. Apple’s iOS 6 was released with just a few days left in the quarter, so any bump from the adoption of iOS 6 or the short time that the iPhone 5 was available likely will not show up in these numbers.