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Expressions vs Patterns: catalog facts
Expressions	Patterns
Paid Commercial Mac app from Apptorium; see the website for current pricing.	Paid The official product page does not state a price.
macOS	macOS
Live preview of matches while editing Library for saving expressions	Shows matches and replacements as patterns are edited Supports multiple regular expression flavors
macOS only Not open source	Available for macOS only
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	Not stated if it 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.