When you open the Avocode App, all recently uploaded designs need to be synced with your app before you can open and inspect them. The sync happens automatically every 5 minutes. You can also force the sync manually by hitting the sync icon in the top right corner. Next to it there is a feature to sort your designs either by “Name”, date of “Last modification” or “Category”.
Categories are automatically created to represent pages in Sketch. Avocode sorts artboards into “flat” folders called Categories and the Categories are named after pages in Sketch. See more...
It is not possible at the moment to create your own categories.