Latest version of MSN Weather app on mobile?

I've lost track of what the latest version of the MSN Weather app available to mobile is. I think I'm stuck on an old version for some reason. To help me out please roll call what version you have, and what ring. Thanks!

The version my phone's able to install is **4.18.52**, on Fast ring (10.0.15237)

For reference, on PCs I see 4.21.1633 and 4.20.1102, so I know there are newer versions than 4.18.52. But I don't know that those versions propagated to mobile.