There are many, many different drawing apps available. Some are very, very good, while others are not so good at all. Some will work on iOS, some will work on Windows, and others will work on both platforms. These include the likes of Adobe, Astropad, Sketchbook Pro, and Krita, which are all excellent, and you’ll struggle to find any artist that doesn’t use at least one of these. Many of them will require a paid subscription, but there are others that are available for free, so if you’re just starting out or want to play around first, then these are an easy, stress-free way to start.\r