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ISO Image Writer vs Popsicle: catalog facts
ISO Image Writer	Popsicle
Free Free and open source under the GPL 3.0.	Free Free and open source.
Linux	Linux, Command line
Single-purpose tool for writing ISO images to USB Graphical alternative to dd	Flashes several USB drives in parallel GTK interface plus a command-line version
Fewer options than full-featured USB writers Linux build on Flathub only, according to the research	Linux only Focused on writing images, with no image download feature
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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