This app is responsible for managing everything related to patterns. Users can create, edit, delete, and view patterns and pattern data. Users can also share different patterns with other registered users. If some users have created a team, patterns can also be shared across an entire team. It is also possible to specify permissions for each pattern. Permissions include things like the ability to fork a pattern, download a PDF version, edit the pattern, .... The app also provides a REST API for accessing the data.