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Khan Academy vs RUTEdu: catalog facts
Khan Academy	RUTEdu
Free Free to use, funded by donations to the nonprofit.	Free Free and open source under the MIT licence.
Android, Web	Android
Free lessons and practice across many subjects Tools for teachers to assign work and track progress	Covers math, chemistry and geography in one app Interactive periodic table of all elements
Signing up is needed to track progress Follows a mostly school-style curriculum	Aimed at high school level only Small university project with a small community
Downloadable app, Web application	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is 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 October 2, 2026

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