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ArityCalc vs Graph 89: catalog facts
ArityCalc	Graph 89
Free Free and open source under the Apache 2.0 licence.	Free Free and open source under the GPL-3.0 licence.
Android	Android
Complex number support 2D graphing of multiple functions and their derivatives	Covers many TI-83, TI-84, TI-89 and TI-92 models Fixes for running on modern Android versions
Developer says it will stop working on certified Android devices once Google's verification rule applies Android only	No ROM included; you must supply your own Maintainer states the fork is not actively maintained
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0-only
Not stated if an account is needed	Not stated if an account is needed
Not stated if it 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.