What is Knock?
Just take a photo of the problem or text at hand!
This is a learning support app that can be used 24 hours a day, 365 days a year, and instantly provides answers, explanations, and hints for questions and sentences that you don't understand.

Suitable for English, Mathematics, and all other subjects.
If you want an app that solves problems or gives you answers, try Knock first!

Recommended not only for high school students who want to improve their study skills such as preparing for university entrance exams and regular tests, but also for those who want to easily perform English-Japanese translation and correction of sentences.
Please experience this highly reliable app developed by a team of graduates from the University of Tokyo.

◆Recommended for these people
・People who want to get good scores and rank on regular tests
・People who want to become better at math and English
・People who want to finish their homework quickly
・People who want to study seriously for university entrance exams (students aiming to get into their desired school)
・People who are learning English and are not good at understanding sentence structure or translating into Japanese
・People who want to pinpoint what they don't understand in any subject

◆Can be used at times like these
For example, studying English
・I can't complete my preparations for long English passages or homework because I don't understand the meanings of words or their Japanese translations.
・It takes too much time to look up a dictionary word by word.
・Unable to understand the structure of reading long sentences
・I don't know where the subject or verb is
・I want to understand SVOC properly
・I want someone to correct my English composition, but there is no teacher nearby that I can ask for right away.

For example, studying mathematics
・I don't have answers or explanations at hand, and the questions are difficult and I can't make progress.
・First of all, I would like you to give me a hint about the problem.
・Even if there is an explanation, it is difficult to understand and I would like you to explain it step by step.
・I want to review related mathematical formulas and theorems
・I want to review related mathematics content with videos.

While studying all other subjects
・When you can't ask your teacher or friend right away
・When it is troublesome to search the internet from scratch
・When you want to directly ask a question about the point you want to find
・When you can't finish your homework
・When you want to check the answers to the problems you have solved

◆How to use and features of Knock
Just take a picture! Easy input
・If you take a picture of the problem or text at hand with your smartphone, analysis will begin instantly.
・One-tap operation, so anyone can use it right away

Receive accurate answers, hints and explanations
- Depending on the content of the photo you took, you will receive information you want to know right away, such as hints, answers, explanations, Japanese translations, and corrections.

Unlimited additional questions
・Simply press the ``more detailed'' or ``more easy'' buttons to dig deeper into the explanation.
・You can also enter your own message and ask pinpoint questions.
・Knock will be there for you until you get it, so you can rest assured.

Highly reliable and can handle even the most difficult problems
・Word problems and entrance exam level questions are also OK. More than just a calculation app
・Developed and operated by a team of University of Tokyo graduates, providing accurate support tailored to learning situations.
・It can also be used as an answer matching app, so you can quickly check the correct answers to homework and problems.

◆Usage fee
・All basic functions are free
・Please feel free to download it first!
・Knock Plus plan (monthly subscription)
・This is a premium plan for those who want to ask more questions.
・There is also a free trial period, so feel free to try it out!

◆Operating company
・Hanji Co., Ltd. (https://site.hanji.inc)
・Developed and operated by members who graduated from the University of Tokyo and have been involved in high school education for a long time.
・Mission: “Bringing more possibilities and opportunities to the people who will lead the next era”
・We operate the Education × AI Research Institute and continue research and development to open up future learning experiences.

◆Official website/SNS
・Official website: https://knock-snap.jp
・X (old Twitter): https://x.com/Knock_snap
・Instagram: https://www.instagram.com/knock_snap/
We plan to update information on new features and advantageous study methods from time to time. Follow us for the latest information!

◆Terms of Use/Privacy Policy
・Terms of use: https://site.hanji.inc/Knock_-9751171345984e79924b46e3e0409460
・Privacy policy: https://site.hanji.inc/Knock_-1055863d1d71801495d6fa0ad58859d4

◆Main usage
・For preparation, review, homework (when you want answers, hints, explanations, corrections, Japanese translations, and related videos)
・Solves mathematical problems (calculations, quadratic functions, trigonometric functions, differential and integral calculus, vectors, sequences, figures and metrics, trigonometric ratios, sets and logic), gives answers, gives hints, and explanations will do
・Solves English problems (grammar problems, reading long sentences, Japanese translations, word searches, syntax interpretation, English composition correction), gives answers, gives hints, and provides explanations.
・Physics, chemistry, and biology are also OK!
・University entrance exams, regular test preparations, and for high school students as well!