Google says Android 10 has been downloaded faster than any version in its history, hitting 100 million devices in five months.
That makes its adoption rate 28% faster than the previous version, it said.
After 300 days, 400 million users were running the latest version of the software.
However, the speed of adoption still languishes behind Apple's iOS, which has a 92% adoption rate for its latest OS among modern iPhones.
, Google said there were 2.5 billion active devices last year - and 400 million running the latest version is only 16% of the possible install base.
However, direct comparisons are not quite that simple. Apple makes its own phones and software updates, and releases the updates itself. Its adoption rate only counts phones released in the last four years.
Android, by contrast, is an open-source operating system used by a huge range of manufacturers which make many different devices.
Those manufacturers have traditionally had to approve major Android releases for their devices, often adding lengthy delays.
That has frustrated some users who are waiting for new features - but some phones that have never received essential security updates could be compromised by bad actors.
