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Expressions vs Regex: catalog facts
Expressions	Regex
Paid Commercial Mac app from Apptorium; see the website for current pricing.	Paid The Mac App Store page lists Regex for US$13.99.
macOS	macOS
Live preview of matches while editing Library for saving expressions	Saves patterns, test data, replacements and options together Supports duplicating saved tests to explore variants
macOS only Not open source	Requires macOS 14.2 or later
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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