It’s a motion-tracking engine and editor. Use together all types of AE tracked data and re-track difficult shots precisely with selections. Adjust bad tracking by working above tracked keyframes.

THE TRACK TOOL
Load all types of AE tracked data: 3D camera tracking solids, tracked masks, tracker points, face tracking data and Mocha data into Retrack.
Draw temporary masks on the generated points cloud to:
Build complex tracking with basic tracked data.
Estimate and rebuild missing tracks.
Retrack offscreen targets.
Points selections allow reliable and precise retracking.
Output to masks, corner pins, transform data, tracker points, nulls.

THE EDIT TOOL
Select and edit tracked data with the Edit tool. It enables a virtual keyframing system that works above the tracked keyframes. The Edit tool let you adjust and refine tracked items very quickly, without the need to modify every tracked keyframe. It supports: masks, corner pins, tracker points, mocha effect tracking data, layers transform properties, and any selected effects 2D properties