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CalHash vs RapidCRC Unicode: catalog facts
CalHash	RapidCRC Unicode
Free Free to use; the developer accepts donations.	Free Free and open source under the GPL.
macOS	Windows
Calculates and compares checksums in a simple Mac interface Builds matched to each macOS release	Multithreaded hashing with asynchronous I/O Unicode-aware SFV and checksum files
macOS only Each build works only on its matching macOS version	Windows only Source code documentation is sparse
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
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 2, 2026

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