Based on our record, MediBang Paint Pro should be more popular than Paintstorm. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
If she wants to expand and more than just mimic traditional paints there are even more programs she might want to consider, the king of the "generalist" softwares is Photoshop, my personal choice, but there are valid alternatives out there, starting from the free and open source Krita, to cheap but solid programs like Clip Studio Paint (especially good for comics/manga, but it can also do other stuff), Paintstorm... Source: over 2 years ago
I was recently recommended Medibang Paint Pro, and while I don't do enough art to have tried it yet, it looks pretty solid. Source: about 1 year ago
I use FireAlpaca and Medibang Paint Pro (they're both free)! Source: almost 2 years ago
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
Corel Painter - Corel Painter is media painting software.
GIMP - GIMP is a multiplatform photo manipulation tool.
Clip Studio Paint - The artist's software for drawing and painting.
MediBang Paint - The official site for MediBang Paint, the free digital painting and manga creation software. You can download the latest version of MediBang Paint here, and get news and tutorials.
PaintTool SAI - Learn to draw in different ways.