Name: SankeyFlow
Price: 6.99 USD
Availability: InStock
Author: Creixems Studio

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About

SankeyFlow is a native macOS app for building Sankey diagrams — the flow charts that show how a total splits and merges as it moves from one place to another. Budgets, energy use, website traffic, headcount, material flows: if it's a total that divides into parts, SankeyFlow draws it.

It's a real document-based Mac app: autosave, a version history you can browse and restore from, tabs for several charts in one window, full keyboard control, light and dark, and no network access of any kind. Documents are plain text, so they stay readable and portable.

Made by Creixems Studio, a design studio by Jaime Creixems. Questions and feedback are always welcome at info@sankeyflow.app.

Requires macOS 26 (Tahoe) or later.

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FAQ

What is a Sankey diagram?

A flow diagram where the width of each ribbon is proportional to the quantity it carries. It's the clearest way to show where a total comes from and where it goes.

How do I build one?

Three ways. Write it in the Text tab, one line per flow: Wages [3000] Budget — a built-in Text Input Guide explains the syntax. Build it visually in the Data tab with a drag-to-reorder list of source, amount, and target; rearranging rows restacks the diagram. Or use the Import tab to paste from Excel or Numbers, or open a CSV or XLSX file.

Can I control how it looks?

Yes. Flow direction (left, right, up, or down), node width and spacing, ribbon curve and opacity, per-node colors from a hand-tuned palette or the built-in color picker (which recolors the diagram live), names and values on or off, a unit, and a background — all in the Style tab of the side panel.

What happens to leftover amounts?

When a box receives more than it passes on (or less), SankeyFlow can show the difference as a gray Remainder box, send it to a box you choose, or leave a gap. You can set this for the whole chart, in the Style tab, or for individual boxes.

What can I export?

PNG, PDF, and SVG, one click away in the Export tab of the side panel. Choose an aspect ratio or an exact pixel size, set a resolution, and add margins, with a live preview. The SVG output is clean and standards-compliant, ready for the web or a vector editor.

Where are my files kept?

SankeyFlow documents are plain-text files with a .sankey extension, saved wherever you choose. No proprietary format, no lock-in.

What does it need?

macOS 26 (Tahoe) or later. SankeyFlow costs $6.99 on the Mac App Store.

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Changelog

Version 1.1 October 8, 2026

New

Remainder. When a box receives more than it passes on (or less), show the difference as a gray Remainder box, send it to a box you choose, or leave a gap. Set it for the whole chart or for individual boxes.
Version history. Browse earlier versions of your chart in the side panel, preview one, and restore it.
Tabs. Open several charts in one window with ⌘T.
Export tab. PNG, SVG and PDF are one click away in the side panel.
Text Input Guide. A built-in guide to writing data, from the Text tab or the Help menu.
New app icon and a refreshed look. Liquid Glass tabs, a redesigned side panel, and a built-in color picker that updates the diagram live.

Improved

Fields in the Data tab respond instantly, and clicking outside a field finishes editing.
Click a field that already has a name to see suggestions and swap it for another.
Long names wrap onto up to three lines, then end in an ellipsis, on screen and in exports. A single word wider than its label is shortened with an ellipsis instead of being split.
Fewer crossing ribbons when flows skip a column.
Better VoiceOver labels for sliders, switches and export options.
The Type tab is now called Text. The left panel has Data, Text and Import; the right panel has Style, History and Export.

Fixed

Opening a file in the Data tab could remove per-flow colors or lines with typos. Your text is now left exactly as you wrote it until you change it.

Version 1.0 September 21, 2026

The first release.

Three ways to build. Write one line per flow, like Salary [3000] Budget; build it visually with a drag-to-reorder list of source, amount, and target; or import a spreadsheet by pasting from Excel or Numbers, or opening a CSV or XLSX file.
Flow direction. Left, right, up, or down.
Tune every detail. Node width and spacing, ribbon curve and opacity, per-node colors from a hand-tuned palette, names and values on or off, a unit, and a background.
Export anywhere. PNG, PDF, and clean, standards-compliant SVG, with an aspect ratio or exact pixel size, resolution, margins, and a live preview.
A real Mac app. Plain-text .sankey documents with autosave and versions, full keyboard control, and light and dark appearance.
Private by design. Runs entirely on your Mac, with no account, no sign-in, and no network.

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Privacy Policy

Last updated: 9 September 2026

SankeyFlow is a Mac app that runs entirely on your device.

What we collect

Nothing. SankeyFlow does not collect, transmit, or share any personal data. It has no analytics, no advertising, no crash reporting, no user accounts, and makes no network connections.

Your documents

The diagrams you create are saved as files on your Mac, wherever you choose to save them. If you keep them in iCloud Drive, they sync through your own Apple account under Apple's terms; the developer of SankeyFlow has no access to them. Your app preferences are stored locally on your Mac.

Third parties

SankeyFlow does not use any third-party services, SDKs, or trackers.

Children

SankeyFlow does not collect data from anyone, including children.

Changes

Any changes to this policy will be posted on this page with an updated date.

Contact

Questions: info@sankeyflow.app

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