Hi Dave. It uses ChatGPT as the backend via an API which is accessed via the app. It does offer some advantages over native ChatGPT in that it generates a specific songwriting prompt for you, you do not need a username or password and you don't need to login anywhere. Also, ChatGPT native is often not available (it reaches its capacity every now and then and you cannot get it. The API is always available).

LyricLab – Where words become music https://www.lyriclab.net/