Zeo found that some user’s wished to have offline access to their sleep data for a variety of reasons (Research, access when there is no internet, tin-hat conspiracies, etc.). We already had a data decoder library that allowed users to extract their data, but it wasn’t very user friendly. I used python and QT to create a simple GUI that allowed users simple access to their sleep data. All the data was stored in xml files in a tree of folders. This allowed users to easily manipulate the data by hand if necessary.