There are several excellent apps and tools to draw on pictures, depending on your needs:

1. Procreate (iOS): A professional-grade app for drawing and sketching with advanced tools and features.
2. PicsArt (iOS & Android): A versatile app that allows drawing on pictures, adding effects, and creating unique edits.
3. Sketchbook (iOS, Android, & Desktop): Perfect for drawing on photos with its intuitive interface and detailed brushes.
4. Canva (iOS, Android, & Web): A user-friendly platform for adding drawings, text, and effects to pictures.
5. Photo Sketch Maker (Free Online Tool): If you prefer not to download any app, this online tool is perfect for converting photos to drawing-like images. It’s easy to use and doesn’t require installation.

These options cater to both casual and professional editing needs!