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Internet Download Accelerator vs Download Master: catalog facts
Internet Download Accelerator	Download Master
Freemium Free edition available, with a paid Pro version.	Free Free to use with no limitations, with optional donations.
Windows	Windows, Browser extension
Segmented downloads over HTTP, HTTPS and FTP Resumes broken downloads	Multi-stream downloading with resume Scheduler, site manager and browser integration
Windows only Some features reserved for the paid Pro edition	Windows only Closed source
Downloadable app	Downloadable app, Browser extension
Closed source	Closed source
License not stated	License not stated
No account 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 September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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