I have some positive experience withe Doodle3D:
doodle3d.com/
It is working with the K8200!
You have to define the printer as Marlin printer.
Probably there are some modifications to improve the result, like speed and temperature etc.
It is easier to use a cold bed with Pritt, because you can monitor the temperature of the extruder, but not of the bed.
You can work with a tablet, iPad or PC ( MS, Apple, Android or Linux ), you have just to open a browser.
It is designed for kids, but it works!
Philip