Can back up those splits, top 5% sub. Majority is on mobile, but stats on platform are difficult to estimate. It would seem that at least 10% of Android is on 3rd party apps. The downloads don't give accurate estimates at the top end (10 mil downloads, then it won't change until 100mil downloads, so you could be off by tens of millions), it doesn't count side loaded apks, and it doesn't specify usage time. There could be a ton of people who downloaded the official app, then moved to 3rd party, and they would count for official download.