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