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Numi vs SoulCalc: catalog facts
Numi	SoulCalc
Freemium Free to download, with a paid license offered on the website.	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Command line	Android, iOS
Write calculations as natural text with variables Built-in currency, unit and time zone conversion	Multi-line calculations with results shown beside each line Named variables reusable across lines
Licensing terms are set by an end user license agreement rather than an open license Not a scientific or graphing calculator	Small project with few commits No dedicated website or documentation beyond the README
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
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 1, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.