Using Adobe Illustrator for iPad with TheVectorLab templates. This tutorial applies to all graphic & logo templates: https://thevectorlab.com/collections/graphic-logo-bundles
T-Shirt Mockup Templates for Illustrator are also shown: https://thevectorlab.com/collections/mockup-bundles-for-illustrator
Full tutorial: How to use Adobe Illustrator for iPad with TheVectorLab templates.