With this app, you can create sketches without worrying about dimensioning, and just focus on the concept. When finished, you can auto dimension your sketch with a couple of simple clicks.
During "top-down" design it is sometimes convenient to attach a sketch to an external geometry. As the design progresses, it is good practice to remove dependencies. Changes can cause unintentional downstream problems for related sketches. With this app, you can remove all external constraints from a sketch.