iPad Apps to Create Custom brushes

ibis Paint X is a popular and versatile drawing and painting application designed for mobile platforms, offering a robust suite of tools for digital artists. It boasts a massive library of brushes, filters, blending modes, and supports layers, pen pressure, and recording timelapses.

SketchPort is a versatile web-based digital drawing application designed for artists of all skill levels. Offering a modern interface and a comprehensive suite of tools, it facilitates everything from quick sketches to detailed illustrations, with features like layer support, customizable brushes, and community integration.

MediBang Paint is a feature-rich, free digital painting and comic creation software available across multiple platforms. It provides a comprehensive toolkit for artists of all levels, from sketching and illustration to manga and comic production.