No. Broadly speaking, it doesn’t.
Maverick Excelsior runs directly on the web browser and is built on top of WebGL, which is a widely-adopted industry standard for 3D graphics. This means that any modern device with a web browser should be compatible.
For example, any desktop or laptop computer, tablet or mobile phone from the past 5+ years should be able to explore interactive content through the Web Excelsior Viewer.
In order to use the Web Excelsior Editor we recommend a desktop or laptop computer, though. Those provide more computational power, and usually come with a much larger display. These characteristics allow for a much better experience when importing, editing and previewing content.
On the other hand, the Web Excelsior Viewer is built to run virtually anywhere. Note, however, that performance may suffer in older or lower-end devices.