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ArityCalc vs microMathematics Plus: catalog facts
ArityCalc	microMathematics Plus
Free Free and open source under the Apache 2.0 licence.	Free Free and open source under the GPL-3.0.
Android	Android
Complex number support 2D graphing of multiple functions and their derivatives	Formulas shown in readable mathematical notation Worksheet keeps calculations together for reuse
Developer says it will stop working on certified Android devices once Google's verification rule applies Android only	Android only Worksheet approach takes some learning compared with a plain calculator
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	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.