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Converter NOW vs Numi: catalog facts
Converter NOW	Numi
Free Free and open source under the GPL-3.0 licence.	Freemium Free to download, with a paid license offered on the website.
Windows, Linux, Android, Web	Windows, macOS, Linux, Command line
Covers both physical units and currencies Same app on Linux, Windows, Android and the web	Write calculations as natural text with variables Built-in currency, unit and time zone conversion
No dedicated homepage beyond the GitHub repository Scope is limited to conversions	Licensing terms are set by an end user license agreement rather than an open license Not a scientific or graphing calculator
Downloadable app, Web application	Downloadable app
Open source	Closed source
License: GPL-3.0-or-later	License not stated
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 1, 2026

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