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CalHash vs GtkHash: catalog facts
CalHash	GtkHash
Free Free to use; the developer accepts donations.	Free Free and open source under the GPL-2.0-or-later licence.
macOS	Linux
Calculates and compares checksums in a simple Mac interface Builds matched to each macOS release	Supports MD5, SHA1, SHA2, SHA3 and BLAKE2 Graphical alternative to md5sum and sha256sum
macOS only Each build works only on its matching macOS version	Checksums only, no signature verification described Plain GTK interface rather than a modern GNOME design
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0-or-later
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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