CalcForge records 31,360 monthly visits with -4.8% month-over-month growth and Free, Paid pricing. Goodnotes records 3,227,341 monthly visits with +10.8% growth and Freemium, Free Trial pricing.
Open-source engineering calculators for civil and structural design
Handwritten notes, PDF markup, and AI study tools on one canvas
| Dimension / Metric | | |
|---|---|---|
| Official Domain | calcforge.com | goodnotes.com |
| Pricing Model | Free, Paid | Freemium, Free Trial |
| Monthly Visits | 31.36K (31,360) | 3.23M (3,227,341) |
| MoM Traffic Delta | -1.56K (-4.8%) | +314.75K (+10.8%) |
| Primary Market & Share | 🇮🇳 India (16.1%) | 🇺🇸 United States (33.8%) |
| Direct Visits / mo | 12.46K | 1.64M |
| User Rating | 4.3 | 4.4 |
| Supported Platforms | Website | Website |
Open-source engineering calculators for civil and structural design
Structural, geotechnical, tunnelling and contractor tools available free and open source on GitHub.
Searchable construction datasets covering high-rise buildings, bridges, tunnels, dams and housing.
Registered users get calculation workings, bending/shear/deflection diagrams and PDF export.
Four project-based pathways in Python, AI for construction, AI governance and building AI agents.
Handwritten notes, PDF markup, and AI study tools on one canvas
Low-latency ink with palm rejection, cross-out to erase, and handwriting-to-text conversion keeps writing close to pen on paper.
Import contracts, papers, or textbooks and mark them up by hand, with searchable annotations and clean exports.
Search across typed text, handwriting, and sketches, and turn notes into summaries, mind maps, or structured plans.
Work together in shared notebooks, documents, and whiteboards simultaneously, without version conflicts or file ping-pong.
SpecialistExcels at automatically generating flashcards and practice quizzes from study notes, but lacks freehand drawing features.
SpecialistExcels at automatically generating flashcards and practice quizzes from study notes, but lacks freehand drawing features.
SpecialistTurns course materials into interactive AI study tools, but focuses less on handwritten digital notebooks.
SpecialistTurns course materials into interactive AI study tools, but focuses less on handwritten digital notebooks.
SpecialistStronger online PDF editing and AI chat capabilities, but lacks tablet-optimized handwritten note-taking workflows.
SpecialistStronger online PDF editing and AI chat capabilities, but lacks tablet-optimized handwritten note-taking workflows.
SpecialistConverts notes and PDFs into quizzes and flashcards, but lacks stylus-based handwriting and sketching tools.
SpecialistConverts notes and PDFs into quizzes and flashcards, but lacks stylus-based handwriting and sketching tools.
Provides gorgeous structured block-based document editing, but is built for typed text rather than handwritten notes.
Provides gorgeous structured block-based document editing, but is built for typed text rather than handwritten notes.
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Free / Open-sourceSearch and study millions of public SKILL.md agent skills
Organizes notes into interconnected typed objects rather than traditional notebooks, but lacks handwritten ink support.
Organizes notes into interconnected typed objects rather than traditional notebooks, but lacks handwritten ink support.
Free / Open-sourceFree practical deep learning courses, research and open-source libraries
SpecialistUses an infinite visual canvas for note organization, but lacks Goodnotes' paper templates and PDF annotation polish.
SpecialistUses an infinite visual canvas for note organization, but lacks Goodnotes' paper templates and PDF annotation polish.
Free / Open-sourceOpen-source database of AI models, prices and capabilities
Free / Open-sourceOpen-source database of AI models, prices and capabilities
Offers spatial whiteboards for organizing complex research, but lacks Goodnotes' freehand handwriting stylus support.
Offers spatial whiteboards for organizing complex research, but lacks Goodnotes' freehand handwriting stylus support.
Free / Open-sourceFree open course for prompt engineering and AI security
Free / Open-sourceFree open course for prompt engineering and AI security
