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Hemmelig vs Secure QR Share: catalog facts
Hemmelig	Secure QR Share
Free The hosted service at hemmelig.app can be used free of charge; the code is under the…	Free Free and open source under the MIT license.
Web	Android
Client-side encryption of shared secrets Messages self-destruct after being read	AES-256 encryption protected by a shared PIN No cloud service or network transfer involved
Source-available O'Saasy licence, not OSI open source Little documentation of features was available in the research	Both people must be physically close to scan the code Small project with few contributors
Web application	Downloadable app
Closed source	Open source
License: O'Saasy	License: MIT
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it 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.