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iotop-c vs Zenith: catalog facts
iotop-c	Zenith
Free Free and open source.	Free Free and open source.
Linux, Command line	Linux, Command line
Shows disk I/O per process rather than per device Familiar top-style terminal display	Zoomable usage charts inside the terminal Per-process disk usage in a filterable process table
Linux only Usually needs root privileges to see all processes	Unix-like systems only, no Windows support Terminal interface only, no graphical app
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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