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Acorn vs PhotoDemon: catalog facts
Acorn	PhotoDemon
Paid One-time purchase with no subscription, after a 14-day free trial.	Free Free and open source.
macOS	Windows
No subscription, paid once AI subject selection and Live Text tool built in	Portable, runs from a USB stick without installing Opens PSD, PSP and XCF files
macOS only Requires macOS 14 Sonoma or later	Windows only Mainly a single-developer project
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
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 23, 2026

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