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CalHash vs Collision: catalog facts
CalHash	Collision
Free Free to use; the developer accepts donations.	Free Free and open source under the BSD 2-Clause licence.
macOS	Linux
Calculates and compares checksums in a simple Mac interface Builds matched to each macOS release	Simple graphical way to verify downloads No need for terminal checksum commands
macOS only Each build works only on its matching macOS version	Linux only Focused on hashing, with no other file tools
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: BSD-2-Clause
No account needed	No account 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.