Getting Started · Core Concepts
Ritsu FAQ: what it is, how it works and who it is for
Short answers about Ritsu: what it does with your own material, who it suits, what the plans cost and what happens to your files.
8 min read
Ritsu is an AI tutor that turns your own chapter, slide deck, lecture video or paper into a study system. Every question it asks points to the page it came from. Every activity is open on the Free plan, which costs $0, so you can test it on one chapter before deciding whether you need more.
Jump to: What Ritsu is and who it is for · How it works · Plans and pricing · Privacy and your files
What Ritsu is and who it is for
Q: What is Ritsu?
Ritsu is an AI tutor that turns your own chapter, slide deck, lecture video or paper into a study system: an ordered plan with page citations, practice that makes you recall, explain and solve, an earned mastery score for every concept, and spaced review that brings back what starts to fade. See it on a textbook chapter.
Q: Who is Ritsu for?
Students and self-learners who study from material they already have: textbook chapters, lecture decks and recordings, problem sets and past exams, research papers, YouTube lectures and web articles. Ritsu is built for people who need to recall, explain and apply what they study, not only get through it, so it suits courses with exams and anyone teaching themselves a hard subject. The use cases show each kind of material.
Q: Does Ritsu work for my subject?
Yes, if the subject is written down or recorded. Ritsu is strongest where the material is dense and builds on itself, such as STEM, pre-med, law, economics and finance. It is weakest where there is little to read and most of the learning happens live. Pick the use case closest to your course to see how a session runs.
Q: Is Ritsu just a chatbot?
No. A chatbot gives you a box to type in and answers whatever you ask. Ritsu is a study system built around your file: upload a chapter and it builds an ordered plan, then has you recall, explain, solve and revisit each concept, scores what you can do and schedules your reviews. You can still ask it to explain anything with /explain or /why. Points of Knowledge shows how the plan is built.
How it works
Q: How does Ritsu work?
In four steps. You drop in your chapter, slides or lecture. Ritsu turns it into an ordered path of small units, each traced to the page it came from. You work through each concept with commands such as /explain, /quiz and /solve. Every concept gets a score that fills in as you master it, and what starts to fade comes back for review. Each unit is a Point of Knowledge.
Q: What can I upload to Ritsu?
Ritsu takes PDFs, PowerPoint slides, Word documents, YouTube links, web pages, Markdown, plain text, code files and images, including textbook chapters, lecture recordings, research papers, problem sets and past exams. Scanned pages work as well as the scan is clean. It runs in the browser, so there is nothing to install. See every source it reads.
Q: Does Ritsu just give me the answers?
No. Ritsu is built to make you produce the answer first. On problems, /solve holds the worked solution back until you have written an attempt; then it grades your work, points to the misconception behind a mistake and asks you to retry. You can still ask for hints when you are stuck. Read how /solve works.
Q: How do I know Ritsu won't teach me something wrong?
Check the page it cites. Every question and explanation shows the page of your file it came from, so you can compare it with your own material in a few seconds. Ritsu can still get something wrong, especially with a messy scan or a long calculation, and when it disagrees with your file, the file is right. When an answer doesn't match your source explains what to do.
Q: What languages does Ritsu support?
Ten: English, Vietnamese, French, Chinese, German, Japanese, Spanish, Portuguese, Korean and Thai. Your documents can be in any language, so you can study an English textbook with the explanations, questions and feedback in one of the other nine. See learning in your language.
Q: Can I use Ritsu on my phone?
Yes. Ritsu is a web app that works in any modern browser on a phone, tablet, laptop or desktop. There is no app to download and nothing to install: open ritsu.ai, sign in and start with a file. The quick start covers your first minute.
Plans and pricing
Prices below are in US dollars, from the pricing page as of October 18, 2026. Tax may apply at checkout.
Q: Is there a free AI tutor?
Yes. Several AI tutors have free tiers. Ritsu's Free plan costs $0 with 600 credits a month, needs no credit card and has no time limit; it includes every activity and learning mode, with 40 pages or 30 minutes of video per source. Paid plans add credits and larger sources. The pricing page compares them.
Q: How much does Ritsu cost?
29 a month on Plus, 119 on Ultra, billed monthly. With annual billing, Plus is 49 and Ultra $99, about 17% less. The paid plans add credits and larger sources; they don't unlock a different product. A Team plan for five seats is coming soon, and Enterprise pricing is custom. Every plan is on the pricing page.
Q: How do credits work?
Credits pay for activities and for processing uploads. A simple command such as /explain uses about 8 credits, a quiz about 20, and a typical 50-page PDF about 50 to process. So the Free plan's 600 a month would cover about 75 explanations or 30 quizzes with no uploads; the pricing page puts it at roughly 5 to 10 documents a month. Plan credits reset monthly; packs you buy never expire. See the credits FAQ.
Q: Which plan should I choose?
Start on Free and let the limit you hit decide. If your chapters run past 40 pages or your lectures past 30 minutes, Plus takes 100 pages or 2 hours per source; Pro takes 200 pages or 6 hours. If you study one topic over many sittings, Free allows 5 sessions per learning project, Plus 20 and Pro unlimited (a session is one study sitting; a project groups sessions by topic). The pricing comparison covers Ultra.
Q: Is there a student discount?
No. The Free plan is designed for students: 600 credits a month with every activity and learning mode included, and it stays free with no time limit. Schools and universities can ask about institutional pricing through Talk to Sales on the pricing page.
Q: Can I cancel anytime?
Yes. You can cancel at any time with no penalty. Your paid plan runs to the end of the billing cycle, and after that your account stays on the Free plan. If you switch plans instead, an upgrade credits you for the unused days of your current plan, and a downgrade takes effect at the end of the current cycle. Details are on the pricing page.
Q: Can I get a refund?
Yes. Your first paid subscription comes with a 14-day full refund, as long as you have used less than 20% of that period's credits. The Refund Policy covers the details, renewals and credit packs. Payments run through Lemon Squeezy, the merchant of record, and refund requests go to billing@ritsu.ai from the email address on your account.
Privacy and your files
Q: Does Ritsu use my files to train AI models?
No. Ritsu states that it does not use your data to train AI models. Uploaded files are encrypted and stored on Cloudflare R2, access is limited by row-level security, and you can delete your files and account at any time. The security policy has the details.
Q: Can I delete my files and my account?
Yes. You can delete your files and your account at any time. For now, account deletion is handled by email: write to privacy@ritsu.ai from the address on your account. The Privacy Policy explains how long deletion takes and what has to be kept for legal reasons, such as tax records.
Still have a question?
Search the help center: each learning command has its own page, and so do uploads, billing and troubleshooting. For billing and refunds, email billing@ritsu.ai; for anything about your data, email privacy@ritsu.ai.
Next: upload your first source on the Free plan, then start a session on it.
By Ritsu Team · Last updated October 18, 2026
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