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Fossify Calculator vs yetCalc: catalog facts
Fossify Calculator	yetCalc
Free Free and open source under the GPL-3.0 licence, with no ads.	Free Free and open source under the BSD-3-Clause licence.
Android	Android
No internet permission, ads or tracking Calculation history	Scientific mode in portrait and landscape Unit converter and programmer mode in one app
Not a full scientific or graphing calculator Android only	Android only Little documentation beyond the app description
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: BSD-3-Clause
No account needed	Not stated if an account is needed
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 2, 2026

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