Artists want to sketch anywhere but phone versions of desktop tools are clumsy. Thumbs need different UX than styluses.
Build a drawing app with touch-optimized brushes, one-hand shortcuts, and palm rejection tuned for small screens. Use cloud sync for cross-device work.
Premium features like animation or 3D modeling justify subscriptions. Partner with phone makers for pre-installs.
Start with core drawing tools and focus on responsiveness. Add advanced features later.
Standing out in a crowded market requires truly novel interaction design.