Nice, although personally, I have found using xrdp along with some RDP client on mac, iPad, iPhone, etc. a more fluid experience.
Apart from Wolfram Cloud app and Wolfram Cloud WWW, i also make good use of Raspberry Pi access through the VNC Viewer app (at home via WiFi connection, on the road via cloud connection). I am NOT sure how many of the readers here are even aware of this possibility. So when i am on the road and have problems with the Wolfram Cloud, i simply access the RPi (which sits powered 24/7 next to my WiFi router at home) and use the local Mma Raspbian installation. It's a great and fun alternative.
This is definitely a dream come true, accessing a "full-fledged" local computer from the road and profiting from its application installations like Mathematica. Raspberry Pi - Mathematica - VNC Viewer app - beautiful combination.
Currently i am on Raspbian Stretch and after the normal update/upgrade routine the version is Mma v12.0.1. Looking forward to v12.2, it's free on the RPi!