You've read in the App-Writer Introduction why App-Writer exists. Now let's get to work using it. To keep it nice and clean, the detailed instructions are provided in the App-Writer Guide. The short Syntax Guide to the Codes is all you need once you get the general idea, especially if you copy the working example below (also included in the Guide), paste it into the InCode box and click Create from Incode. You will have a fully working app in a few seconds. Remember, the resulting app is 100% independent of this site - everything you need for an app to run on your own site in your own manner is provided for you.
Syntax Guide to the Codes
Example to copy/paste into the InCode box, then click the button to create a basic app.