[kbcool]

It's probably within an order of magnitude but it's really just hobbyists, casuals and indies using it.

If you compare it to React Native there probably are more Flutter apps published but if you drill down into the top 1000 on each app store you would be lucky to find more than a few in most countries using Flutter whereas React Native definitely makes up more than 10%, maybe as high as 30% of non-game apps. I know on my phone I have zero Flutter based apps installed and almost 20% use React Native in some way.

Source: I'm an app developer so I keep an eye on these things.