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3D Geometry Animation vs ArityCalc: catalog facts
3D Geometry Animation	ArityCalc
Free Free and open source, distributed through F-Droid under the MIT licence.	Free Free and open source under the Apache 2.0 licence.
Android	Android
Cartesian, polar, spherical and parametric surface definitions Time variable for animating formulas	Complex number support 2D graphing of multiple functions and their derivatives
Android only Small project with no tagged releases on GitHub	Developer says it will stop working on certified Android devices once Google's verification rule applies Android only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
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.