An AI tutor that explains why your code does what it does, and cites a source for every answer. 100 questions a month free, no credit card. Built for CS and STEM students.
Free to try — five questions a day, no account needed. Sign up free for 100 questions a month, saved to your account.
Yes. The free plan includes 100 AI tutor questions every month, and every answer cites a source. No credit card is required. You can ask five questions a day with no account at all. A free account raises that to 100 questions a month and keeps your answers.
Your allowance resets each month. If you need more, Pro is $19.99/month and raises it to 500 questions per month, still with a cited source on every answer.
That is what it is for. Ask it to trace what a loop or method actually does, explain why code that runs still returns the wrong answer, or walk through Big-O for an algorithm — then ask the follow-up until you can explain it without help.
No. The GPA calculator, study plan generator and thesis statement generator are all free with no account at all. The AI Tutor gives you five questions a day without one too — an account only raises the limit and saves your answers.