ArtFlow is a painting and drawing application that can transform your device into a digital sketchbook. With over 80 paint brushes, smudge, fill, and eraser tools, this app is fast and intuitive, unlocking the full power of your imagination. It supports pressure-sensitive pens, like Samsung's S Pen, which can turn your device into a real canvas. However, some advanced features require a pro license in-app purchase, which can activate all devices associated with your Google account.

The app's high-performance paint engine is GPU accelerated, and it can handle canvases up to 6144x6144 with 50 layers. It also supports stylus pressure and pressure simulation for touches. With over 100 brushes and tools, including smudge tool and gradient fill, you can create custom brushes from imported images. The app also has selection and selection masks, layer clipping mask, and 10 layer filters, among other features. It has a material design inspired, fast, fluid, intuitive, and accessible user interface. You can import and export PNG, JPG, and PSD (Photoshop Document) files, and it also supports NVIDIA DirectStylus and palm rejection.

ArtFlow aims to replace your physical sketchpad and become a universal art studio type application for Android. You can paint, sketch, and draw with ease thanks to the fast and fluid brush engine. The app has been used by several artists, including Oleg Stepanko, Miguel Alvarado, and David Rivera, among others. However, the unlicensed version has some limitations, such as 20 basic tools, 3 layers, and undo limited to 6 steps, and no PSD export.

In conclusion, ArtFlow is a powerful painting and drawing application that can turn your device into a digital sketchbook. It has several advanced features, including stylus pressure support, pressure simulation for touches, and layer filters, among others. The app has a fast and fluid brush engine, and it aims to become a universal art studio type application for Android. However, some advanced features require a pro license in-app purchase, and the unlicensed version has some limitations.