ThePatternDrafter uploaded a videoIntroduction to the Pattern Drafter by Maria Martin Designs
It depends what you mean by plus size.
If you measure your daughters bust, waist and hips you can see if The Pattern Drafter will be suitable for her measurements.
The Pattern Drafter measurements are: bust 80cm to 136cm Waist and Hips 60cm 140cm
If your daughters measurements fit within the range of the ruler, then yes it will make patterns for her.