Downloded driver for primary computer, an Asus 2N1, and the app for my kindle fire with the intention of having a second screen to send another app, like an email client or browser for research, not a duplicate/mirror of my primary computer screen. Is Spacedesk capable of that?
Yes – spacedesk is acting as an additional display monitor. Thus it can be set to Desktop Duplication (mirror) and Desktop Extension. Please check the instruction manual https://spacedesk.net/user-manual/ Look at chapters “CONFIGURATION AND SETTINGS”->”Primary Machine”->”Desktop Extension or Desktop Duplication (mirror) Settings…”.
.
