Level Up: Advanced 5th Edition is an "advanced", standalone version of the 5E ruleset. It adds more customization and depth to the game. A5E is 100% compatible with 5E, however, it is a core ruleset. It includes everything you need to play.
This is an OPEN BETA toolset, and is a work-in-progress. Content, appearance, and functionality are continually being added and tweaked. This is all part of the process. Please be patient!
Open Gaming Content Notice
Open Gaming Content can be found in the separate System Reference Document, available to download as a PDF. This online toolset is not the SRD.