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Plus42 vs SpeedCrunch: catalog facts
Plus42	SpeedCrunch
Free Desktop builds are free and open source under GPL-2.0; mobile store pricing is not stated.	Free Free and open source under the GPL.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux
Faithful HP-42S behaviour with modern additions Plotting, units and TVM built in	Results update as you type Up to 50 digits of precision
RPN workflow takes time to learn Aimed at HP calculator users rather than casual use	Latest advertised release is the long-standing 0.12 Keyboard-centred design may not suit button-only users
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-2.0-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.