Red Sheet vs スマホで赤シート
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Red Sheet
Create and study flashcards from your PDFs, notes, and images. This app lets you hide and reveal text to transform study materials into interactive flashcards for faster memorization. Supports various import options and flexible study tools.
- Create flashcards from PDFs
- Import from note apps and cloud storage
- Hide and reveal text for study
- Create flashcards from photos and images
- Vocabulary and word list flashcards
- One-tap show/hide for quick review
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◆ All-in-One PDF Memorization App with Red Sheet Study Turn your PDFs, notes, textbooks, handouts, and images into powerful study materials. This app helps students memorize faster by hiding and revealing important parts of their own documents. Import PDF files, photos, scanned notes, class handouts, worksheets, and study materials, then create memorization blocks directly on the page. It works like a digital red sheet, flashcard maker, and PDF study tool in one simple app. ◆ PDF Memorization Made Simple ・Import PDF files and study directly from the page ・Hide words, definitions, formulas, diagrams, and answers ・Tap to reveal hidden areas while reviewing ・Use red sheet style memorization on PDF pages ・Study textbooks, school handouts, exam materials, and notes ・Create your own PDF memorization notebook If you already study with PDFs, this app turns them into active memorization tools. ◆ Red Sheet Style Study for PDFs and Images Use memorization blocks to cover the parts you want to remember. Place blocks over text, formulas, diagrams, definitions, answers, or explanations. ・Hide text like using a red sheet ・Reveal answers by tapping ・Create blocks anywhere on a PDF or image ・Adjust block size by dragging the edges ・Change the color and style of blocks ・Use blocks for notes, textbooks, worksheets, and scanned documents This is useful when you want to memorize from your own materials without rewriting everything into separate flashcards. ◆ Smooth Vertical Review for Memorization Review multiple PDF pages and images smoothly. Vertical scrolling makes it easy to study long documents, like moving a red sheet from top to bottom. ・Scroll vertically through study pages ・Review many PDF pages at once ・Memorize photos and handouts continuously ・Swipe between pages and cards ・Add more images when needed ・Study at your own pace Useful for test prep, school study, certification exams, language learning, and daily review. ◆ Useful Study Tools ・One-tap show and hide for fast review ・Multiple memorization blocks for one page ・Auto-align blocks for cleaner layouts ・Zoom in with two fingers to study small text ・Hidden areas stay aligned even when zooming ・Add memo text to support memorization ・Hide memo text for self-testing ・Organize study decks by title or subject Create separate study materials for English, science, history, math, medical terms, law, certification exams, or any subject that requires memorization. ◆ Great For ・Students preparing for tests and exams ・PDF study and textbook review ・Vocabulary memorization ・Language learning ・Science, history, math, and social studies ・Certification exam preparation ・Medical, legal, and technical study ・People who want a simple flashcards maker ・Students who use GoodNotes, notes apps, or PDF files ・Anyone who wants to memorize from their own materials ◆ How to Use 1. Import a PDF file, photo, or image 2. Place memorization blocks over the parts you want to hide 3. Tap to reveal the answer while studying 4. Repeat until you can remember it 5. Organize your materials by subject and review again ◆ Why This App Is Different This app focuses on PDF memorization and red sheet style study. You do not need to recreate every page from scratch. Use your own PDFs, notes, handouts, images, and textbooks as they are, then hide only the parts you want to memorize. It is a simple way to turn everyday study materials into flashcard-style memorization tools. ◆ Recommended If You Want ・A PDF study app for memorization ・A flashcards maker from PDFs ・A red sheet style study app ・A way to memorize school notes and handouts ・A simple tool for exam preparation ・A study app that works with your own materials ・A faster way to hide and reveal answers Start studying your own PDFs, notes, and images with red sheet style memorization. Make your study materials easier to review, repeat, and remember. Terms of Service https://hidevoicy.com/en/tos Privacy Policy https://hidevoicy.com/en/privacy
スマホで赤シート
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効果的な勉強をしたい方へ。 「スマホで赤シート」は、スマホを赤シートとして使えるアプリです。 「スマホで赤シート」を使って写真やスクショを見ると、赤い文字が消えます! 保存した写真やスクリーンショットを使って暗記帳を作れます。 英単語の暗記や、試験・資格の勉強に使ってください!
Screenshots
Verdict
The clearest difference is in-app purchases: スマホで赤シート at none against Red Sheet's 9. スマホで赤シート also leads on ads (none vs shown) and update cadence (daily vs every 3 days). Red Sheet's advantage is device support (4 vs 2) and iOS requirement (13.0 vs 17.0). On price there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Red Sheet sells 7 in-app purchases, starting at $2.99 per month. スマホで赤シート asks for nothing beyond the download.
Red Sheet ships an update every 3 days, スマホで赤シート daily. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.
| Parameter | Red Sheet | スマホで赤シート |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (5 ratings) — better | — |
| Positive reviews | 77.8% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 days | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 193 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Foodmenu.world Inc. | Keisuke Shibata |
In-app purchases
Red Sheet
- Monthly Special plan$2.991 Month
- Monthly Super Saver Plan$2.991 Month
- Monthly Value Plan$3.991 Month
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- Basic Plan$5.991 Month
- 3 Month Plan - V 3.1.5 needed$9.993 Months
- Half year plan (Sale)$17.996 Months
- Half year plan - V2.9.0 needed$22.996 Months
スマホで赤シート
No in-app purchases








