AI Education & Learning Tools
Flexi by CK-12
Completely free AI tutor for math and science from the nonprofit CK-12 Foundation.
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DEV-TOP · horizontalWhat it does
Flexi is CK-12's AI tutor, built to walk students through math and science questions with step-by-step guidance and follow-up conversation rather than just handing over an answer, and is free with no premium tier since CK-12 is a nonprofit.
This is a direct link to Flexi by CK-12 — we don't currently earn anything from it.
Free tier reality
Completely free for all students and teachers, with no paid tier.
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DEV-MID · rectangleKey features
- Conversational, Socratic-style AI tutoring
- Photo and typed question entry
- Built on CK-12's free science and math content library
- No account cost or premium upsell
Best for
- Students who want free, unlimited AI tutoring without a paywall
Try free first
Want something that never needs an account? Try our own free tools first.
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Photomath
Scan a math problem with your phone camera and get AI step-by-step solutions.
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DEV-BOTTOM · horizontalFlexi by CK-12 FAQ
Questions about this tool
Is Flexi by CK-12 free?
Yes — Completely free for all students and teachers, with no paid tier.
What is Flexi by CK-12 best for?
Students who want free, unlimited AI tutoring without a paywall
What platforms does Flexi by CK-12 run on?
Flexi by CK-12 is available on: web, ios, android, chrome-extension.