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Fossify Calculator vs CalcYou: catalog facts
Fossify Calculator	CalcYou
Free Free and open source under the GPL-3.0 licence, with no ads.	Free Free and open source under the GPL-3.0, with no ads.
Android	Android
No internet permission, ads or tracking Calculation history	Scientific calculator, unit converter and grapher in one app No ads or trackers
Not a full scientific or graphing calculator Android only	Currency rates only update with app releases Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	No account 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.