Sankey Monkey: Chart Maker

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In-app purchases

About this app

Sankey Monkey is the ultimate mobile chart maker for creating stunning, mathematically precise Sankey diagrams right from your phone. Whether you are mapping out your monthly budget, visualizing energy flow, or building data infographics for a presentation, Sankey Monkey makes complex data beautiful and easy to understand.

Stop struggling with clunky desktop spreadsheet tools. Our intuitive, touch-friendly "Flow Studio" allows anyone to build professional-grade flow charts, financial trackers, and supply chain visualizers in minutes.

📊 WHAT IS A SANKEY DIAGRAM?
A Sankey diagram is a unique type of flow chart where the width of the arrows is proportional to the flow quantity. They are the absolute best way to visualize where your money goes (income vs. expenses), how time is spent, or how data moves through a system.

💡 PERFECT FOR:
• Personal Finance & Budgeting: Map your salary, side hustles, taxes, savings, and living expenses in one beautiful visual budget.
• Data Visualization: Turn boring numbers into engaging infographics for work or school.
• Energy & Resource Tracking: Visualize power consumption, supply chains, or carbon footprints.

✨ POWERFUL FEATURES:
• Smart-Balance Engine: No need to do the math! Our Smart-Fill tool automatically calculates remainders and balances your flows evenly across target nodes with a single tap.
• Contiguous "River" Stacking: Built with a professional, zero-gap mass-balance algorithm to ensure your data flows smoothly without messy overlapping lines.
• Total Customization: Adjust node widths, vertical gaps, and custom color palettes to match your personal aesthetic or brand.
• Portrait & Landscape Modes: Fully responsive! Edit data easily in portrait mode, or rotate your phone for a cinematic landscape view of your entire flow chart.
• Light & Dark Mode: Switch themes instantly with full Material 3 dynamic color support.
• JSON Export & Import: Save your projects locally, export your diagrams as portable JSON files, or share your data flows with colleagues.
• High-Res Export: Export your finished Sankey diagrams as high-resolution images, perfect for sharing on social media (like Reddit's r/dataisbeautiful), presentations, or financial reports.

🔒 100% PRIVATE & AD-FREE
Your data is your business. Sankey Monkey is a privacy-first app. We do not collect, store, or share your personal data. Everything is calculated and saved locally on your device. There are zero ads, zero tracking scripts, and zero required account sign-ups.

🚀 UNLOCK PRO (In-App Purchase)
Sankey Monkey is free to use for standard Origin-to-End flows. Upgrade to Pro via a simple, secure in-app purchase to unlock Intermediate Columns! Create massive, multi-tiered networks to map complex data with unlimited routing possibilities.

Turn your complex data into a clear story. Download Sankey Monkey today and master your flow!