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Where this app stands in Japan, updated 9 Oct 2026
Top free · Education
#91 ▲8
Top grossing
Not in this chart today
Top paid
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| Date | Free |
|---|---|
| 9 Oct 2026 | #91 |
| 8 Oct 2026 | #99 |
Best rank in each country today. Click a country to see its graph.
- 問題シェア機能を追加 - 採点機能の改修 - 学習記録の可視化 - Q&A機能の改修 - その他UIやバグの修正
Just solve the problems on paper and take a picture. AI will grade and correct your work, including partial credit, within 30 seconds. These are the three problems you need to do today. Prepare for the written portion of the exam by creating a study plan based on your target school.
SIRUS is an AI-powered learning app for university entrance exam mathematics and essay writing preparation, designed for students aiming for national and prestigious private universities. Simply take a picture of your handwritten answers on paper with your smartphone, and within 30 seconds, the AI will grade and correct them, including partial credit, and provide feedback calculated backward from your target university. Even without the ability to ask a teacher or tutor for corrections, you can continue your essay writing preparation for your desired university every day. ◆Recommended for: ・High school seniors and graduates aiming for national or prestigious private universities ◆Do you have these concerns? ・I want to prepare for essay writing, but I don't have anyone to objectively review my answers. ・I hesitate to ask my teacher, so I end up not being able to resolve my questions. ・I want to study to get into my desired university, but I'm worried if just using textbooks and past exam questions is enough. ・I want a learning pace-setter that tells me, "This pace is okay." ・I don't know where to start with mathematics. I don't even know where my weaknesses lie. SIRUS takes care of everything, from "how to do it" to working together with you on your path to success. ◆Daily Life with SIRUS ・Simply solve problems on paper and take a picture. Send your handwritten answers, and you'll receive grading and feedback within 30 seconds. ・It reviews not only the answer, but also the steps. Partial credit and specific comments help you understand what to improve next. Detailed analysis from three perspectives: strategy, proof, and calculation. ・The more answers you submit, the deeper the AI understands your strengths and weaknesses. ・Today's task: these three problems. Daily problems tailored to your current level are selected from 3,000 questions based on entrance exam analysis. You can sit down at your desk without hesitation. ・Work backward from your target school. Check your current position and passing line for each subject area with a chart, and then create a study plan. You can focus on the problems you need to solve now. ◆What SIRUS Values ・Don't compare yourself to others. Don't just solve problems and forget about them. Each question helps you build a solid foundation of knowledge. ◆About the Operating Company - Developed and operated by DeNA Co., Ltd. - Developed with the concept of "reading the thought process from handwritten answers and providing each individual with the optimal thought process and the shortest path to success." Please send your opinions and feedback to sirus@dena.com. Official Website: https://lp.sirus.jp/ Privacy Policy: https://sirus.jp/legal/privacy-policy