# Ruidaichan-Extra Math Practice — Math worksheets from a photo > Math worksheets from a photo (iPhone/iPad app by Naoki Ohashi.) - Source: https://appshunter.io/ios/app/ruidaichan-extra-math-practice/id6759811359 (this page in markdown: same URL + `.md`) - Developer: [Naoki Ohashi](https://appshunter.io/developer/1880818831) - Category: Education, Utilities - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 16.6 · 18 MB - Languages: English - Released: 2026-03-16 - Data updated: 2026-09-15 - User reviews in markdown: https://appshunter.io/ios/app/ruidaichan-extra-math-practice/id6759811359/reviews.md ## What is Ruidaichan? Create printable math worksheets from elementary school word problems. This app automatically generates similar practice worksheets (A4 size) from a photo of a math problem. Designed for elementary school students, especially grades 1–3, to practice word problems and basic calculations at home. Great for extra practice when children need more repetition with the same type of problems. 【Good for situations like】 * Homework is not enough practice * You want more problems of the same type * Review elementary school word problems * Print worksheets at home * Create extra worksheets for cram schools or tutoring * Add review problems for classrooms or after-school programs * Give similar but different worksheets to each student 【Features】 * Scan math problems using OCR (photo text recognition) * Automatically generate similar practice questions * Create printable A4 PDF worksheets * Save, share, and print generated worksheets 【How to use】 1. Take a photo of a math problem 2. Generate a similar worksheet 3. Print or share the PDF worksheet Free monthly usage is available. Images and OCR text are only sent for worksheet generation and are not stored. Q. Can 4th graders use this app? A. Yes. While mainly designed for grades 1–3, it can also be used for 4th grade review and extra practice. Q. Can it generate only word problems? A. Yes. The app supports generating similar word problems. Q. Can I print the worksheets? A. Yes. Generated worksheets can be printed on A4 paper using home printers or convenience store printing services. Q. Can I save worksheets as PDF files? A. Yes. Worksheets can be saved and shared as PDF files. Q. Can it generate more problems of the same type? A. Yes. The app creates similar practice problems based on the original question. Q. Is it useful for homeschooling or home learning? A. Yes. It is designed for home learning, review practice, and extra exercises. Q. Does the app use OCR? A. Yes. The app reads math problems from photos using OCR technology. Q. Does it support calculation problems too? A. Yes. Both word problems and basic calculation problems are supported. Q. What type of learning app is this? A. This is a printable worksheet generation and review-focused math learning app that uses OCR to read problems and generate similar worksheets. Q. What situations is this app used for? A. It is used for home learning, cram school review worksheets, classroom review practice, homework support, and repeated practice of weak areas. Q. Can teachers use this app? A. Yes. Teachers, tutors, and cram schools can use it to quickly create additional practice worksheets. Terms of Use: https://github.com/MakikoOhashi/kima-app-policies/blob/main/ruidaichan-terms.md Privacy Policy: https://github.com/MakikoOhashi/kima-app-policies/blob/main/ruidaichan-privacy.md ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Light Plan | $1.99 | per month | | Premium Plan | $4.99 | per month | ## Version history (last 5 releases) ### 1.0.9 — 2026-05-19 Added　App Previews for JP　Fixed Support URL ### 1.0.8 — 2026-05-15 Description added ### 1.0.7 — 2026-05-10 Title fixed ### 1.0.6 — 2026-05-09 Description fix ### 1.0.5 — 2026-05-08 Description added ## Apps similar to Ruidaichan | App | Rating | Price | Category | | --- | --- | --- | --- | | [Qdeck - OCR](https://appshunter.io/ios/app/qdeck-ocr/id6755375805) | — | Free | Education | | [Clock Worksheet Maker](https://appshunter.io/ios/app/clock-worksheet-maker/id6757356964) | — | Free | Education | | [漢字ドリルメーカー](https://appshunter.io/ios/app/id6757684042) | — | Free | Education | | [Print Exercise for Arithmetic](https://appshunter.io/ios/app/print-exercise-for-arithmetic/id6450254330) | — | Free | Education | | [無限漢字ドリル - AI例文でプリント作成&カードで暗記学習](https://appshunter.io/ios/app/ai-and/id6756286848) | — | Free | Education | | [Quiz: Add and Subtract](https://appshunter.io/ios/app/quiz-add-and-subtract/id1398958231) | — | Free | Education | ## More apps by Naoki Ohashi - [Wakarumade](https://appshunter.io/ios/app/wakarumade/id6760085401) - [えいさくくん](https://appshunter.io/ios/app/id6767095696) - [Pocket Shiroiro](https://appshunter.io/ios/app/pocket-shiroiro/id6777675053) - [Pocket Aoiro](https://appshunter.io/ios/app/pocket-aoiro/id6795358884) All apps by Naoki Ohashi: https://appshunter.io/developer/1880818831 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-15.*