This week, Microsoft announced its new Paint 3D app, a product that allows anyone to easily make 3D creations. The app will arrive with the upcoming Creators Update next March, but Insiders can grab it right now, for PCs at least.
In fact, Microsoft only showed it off for PCs, which makes sense given the lack of pen support on Windows phones. Luckily, Dona Sarkar confirmed that Microsoft is working on the app for Windows 10 Mobile, but it's only in alpha right now.
This isn't particularly surprising. When Microsoft offered the Skype Preview UWP app to Insiders, it showed up on PCs first, but Mobile took months. This seems to be the same type of situation; however, one must ask just how unstable it is, as Fast ring builds are meant to be "alpha" as well.
It also raises the question of what Microsoft has planned for the Windows 10 Mobile Creators Update, as everything that the company showed off at its event was for PCs. The firm did show off new Continuum features at its Ignite 2016 conference, but not anything that would apply to "creators". With Paint 3D coming to Windows 10 Mobile, it's possible that we might see pen support in the future.