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Numi vs Convertidor: catalog facts
Numi	Convertidor
Freemium Free to download, with a paid license offered on the website.	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux, Command line	Linux
Write calculations as natural text with variables Built-in currency, unit and time zone conversion	More than 300 units of measurement Instant conversion as you type
Licensing terms are set by an end user license agreement rather than an open license Not a scientific or graphing calculator	Linux only Small project with a short commit history
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
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 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.