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Fossify Calculator vs NerdCalci: catalog facts
Fossify Calculator	NerdCalci
Free Free and open source under the GPL-3.0 licence, with no ads.	Free Free and open source under the GPL-3.0.
Android	Android
No internet permission, ads or tracking Calculation history	Variables reusable across lines Natural syntax for percentage calculations
Not a full scientific or graphing calculator Android only	Android only Text-based input takes some getting used to
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
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.