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Thorium Reader vs Icecream Ebook Reader: catalog facts
Thorium Reader	Icecream Ebook Reader
Free The open-source software is available without a license fee. Hosting, hardware and…	Freemium Free to use, with a paid PRO upgrade.
Windows, macOS, Linux	Windows
Supports library imports, bookmarks and adjustable reading layouts.	Opens many formats, including comics Highlights and notes searchable by colour
Format and protection support depend on the book being opened.	Windows only No support for DRM-protected books
Downloadable app	Downloadable app
Open source	Closed source
License: BSD-3-Clause	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 September 24, 2026

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