This is the first public release of the seventh version of TRACMASS. TRACMASS calculates Lagrangian trajectories offline for both the ocean and atmosphere by using already stored velocity fields, and optionally tracer fields. The velocity fields may be taken from ocean or atmosphere circulation models, reanalysis products or observations. The fact that the numerical scheme in TRACMASS is mass conserving allows us to associate each trajectory with a mass transport and calculate the Lagrangian mass transport between different regions as well as construct Lagrangian stream functions. What is new The code has been thoroughly cleaned up Supported test cases from: Ocean circulation models: NEMO, MOM5, ROMS, satellite ocean current data AVISO, atmospheric circulation model data: IFS (ERA-Interim, EC-Earth) Any tracer can be followed e.g. biogeochemical tracers or chemical compounds in the atmosphere. A quick-start guide and a comprehensive documentation can be found at https://www.tracmass.org/docs