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Voxengo SPAN vs DigiCheck NG: catalog facts
Voxengo SPAN	DigiCheck NG
Free Available without a software purchase.	Free Free download from RME, but it requires an RME audio interface.
Windows, macOS	Windows, macOS
Shows frequency spectra and signal statistics Includes correlation and loudness metering	Hardware-based metering with minimal CPU load Modular, resizable layouts saved as workspaces
Requires a compatible plug-in host.	Only works with RME audio interfaces Windows version is still in beta
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
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 September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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