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Rebelle vs MyPaint: catalog facts
Rebelle	MyPaint
Paid Paid software in standard and Pro editions, with a free trial.	Free Free and open source under the GPL.
Windows, macOS	Windows, Linux
Realistic simulation of wet paint, mixing and drying Covers watercolor, acrylic, oil and dry media	Infinite canvas with no fixed document size to plan around Extremely configurable brushes with full graphics tablet support
No Linux or mobile version Trial download requires giving an email address	Last stable release was 2.0.1 in 2020; newer work is only in nightly builds Windows and Linux only in official builds; no macOS release
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.