Here's the breakdown on Dec 3rd, 2018: https://photos5.appleinsider.com/gallery/28764-45426-ios12-adoption-charts-dec-4-2018-l.jpg https://photos5.appleinsider.

Here's the breakdown on Dec 3rd, 2018: https://photos5.appleinsider.com/gallery/28764-45426-ios12-adoption-charts-dec-4-2018-l.jpg https://photos5.appleinsider.com/gallery/28764-45426-ios12-a... iOS adoption of new versions is extremely strong and has typically always been that way. Rate of adoption is fast as well. From release of a new version to 50% adoption is often just a few weeks.