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RUTEdu vs IXL: catalog facts
RUTEdu	IXL
Free Free and open source under the MIT licence.	Paid Requires a paid membership.
Android	Web
Covers math, chemistry and geography in one app Interactive periodic table of all elements	Large K-12 skill library across several subjects Diagnostic and analytics for tracking progress
Aimed at high school level only Small university project with a small community	Paid membership required Focused on K-12 curricula
Downloadable app	Web application
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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