A free and open source math plotter, easy to pick up
Screenshot annotation tool for Mac with arrows, redaction, and polished designs
Stage
Established
Not given
Founded
2011
Not given
Based in
Not given
GE
Pricing model
Open source
Freemium
Pricing
Not given
Free version with all core annotation tools and up to 10 screenshots per day. Pro available as Monthly at $2/month, Annual at $19.99/year, or Lifetime at $38.99 one-time payment.
Key features
Natural function notation like f(x) = 2 + cos(x)
Sequences from recurrence relations
Parametric equations with custom intervals
CSV data import and spreadsheet editing
Animated constants and variable families
Vector and image exports (SVG, PDF, PNG, JPEG, BMP, PPM)
Grid customization with π multiples for ticks
Interactive navigation with drag and zoom
Multi-language support in 9 languages
Built-in manual and automatic work saving
Arrows for directing attention and annotation
Numbered counters for step-by-step tutorials
Highlight tool for emphasis
Permanent redaction for sensitive information
Shapes for framing and illustration
Backgrounds and borders for polish
PDF page annotation
Spotlight and crop tools
What makes it different
Draws mathematical objects exactly as written on paper with natural notation
Handle CSV files of several million cells
Objects can build on each other in expressions
Exports with exact size in real centimeters
Fully free and open source under GNU AGPL license
No account or sign-up required to start using
All screenshots stay locally on your Mac with no uploads
Permanent redaction that cannot be removed from exported images
ZeGrapher
Snapperon