SketchBook for iPhone

What this app is for

SketchBook (the mobile edition) is a free digital drawing and painting application designed for quick sketching as well as detailed illustration work. It brings many of the features found in desktop illustration software into a compact mobile interface so you can create anywhere — from rough concept sketches to frame-by-frame animations.

Key capabilities

• Extensive brush options, including both factory presets and user-created brushes for varied textures and effects
• Support for multiple layers and compatibility with Adobe Photoshop (.PSD) files, so you can move projects between devices and apps
• Animation and flipbook tools that let you produce simple motion sequences directly inside the app
• Canvas controls such as rotate, zoom, and transform, plus built-in rulers for precision drawing

Perspective, grids, and rulers

• Customizeable grid tools (including infinite and constrained grid modes) and a curve ruler for drawing complex arcs and shapes
• Three-way perspective support: choose one-, two-, or three-point perspective with snapping and an option to hide or show the horizon line
• Vanishing point locking to keep perspective-consistent lines anchored while you draw

Interface and workflow

SketchBook’s interface prioritizes accessibility: the screen layout maximizes visible workspace while keeping commonly used tools one tap away. The app aims to let you begin creating immediately without bouncing between multiple programs, covering ideation through polished output in a single environment.

Strengths and a limitation to note

• Strengths: free to use, polished mobile performance, wide brush selection, familiar toolset for illustrators and designers, and PSD compatibility for cross-platform workflows
• Limitation: exported or saved files can sometimes differ in resolution or visual quality compared with the on-screen work-in-progress (WIP), so be sure to verify final output settings before delivering client files

Who should try it

If you want a portable drawing studio that mirrors many desktop features, SketchBook mobile is a strong choice for concept artists, illustrators, designers, and hobbyists looking for a no-cost, capable sketching app.