Comparison

百人一首 簡単に暗記 vs Red Sheet

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

百人一首 簡単に暗記

This app helps you memorize the Hyakunin Isshu through customizable practice sessions. Choose specific poems, rules, or color sets for focused learning. It also includes a comprehensive review mode and reference materials.

Highlights
  • Customizable practice modes (range, rules, notation)
  • Color-coded poem selection
  • Review of incorrect answers
  • Full Hyakunin Isshu review mode
  • Score saving and past error practice
  • Reference materials with readings and translations
Features
Read full description

百人一首を暗記するためのアプリです。出題範囲や決まり字などの条件を指定して百人一首の暗記ができます。アプリならではの操作性でさくさく暗記しましょう。 ◆ 出題形式について 歌の出題形式は上の句が表示され、その対となる下の句を4択から選択する形式です。読み上げ機能はありませんが、1文字ずつ表示することで出来るだけ読み上げに近い雰囲気で練習できます。場所を選ばずどこでも気軽に百人一首の暗記ができます。 ◆ 機能 ■ 練習 百人一首の出題範囲、決まり字、漢字/仮名表記を指定して効果的に暗記することができます。五色の指定も対応したので、色単位に覚えたい方にもおすすめです。練習後は間違えた問題だけ復習する機能も実装しています。繰り返し練習することで効率良く百人一首を習得しましょう。 ■ 力試し 百人一首の総復習として全百首がランダムに出題されます。結果は最大十回まで端末に保存され、過去間違えた問題だけ練習することもできます。 ■ 資料 百人一首の資料です。読み方や現代語訳を確認できます。 ◆ アプリについて 「百人一首 簡単に暗記」は無料のアプリです。一部画面に広告を表示していますが、練習中には邪魔にならないように表示しないようになっています。 ◆ ご意見・ご要望など レビューに書いていただけると開発の励みになりますのでよろしくお願いします。 ◆ 次回の更新について 要望、改善などあれば随時対応しますので、レビューなどに書いていただけるとありがたいです。

About

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.

Highlights
  • 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
Features
Read full description

◆ 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

Screenshots

百人一首 簡単に暗記4 screens
Red Sheet4 screens

Verdict

The call

The clearest difference is in-app purchases: 百人一首 簡単に暗記 at none against Red Sheet's 9. Red Sheet's advantage is update cadence (every 3 days vs every 2 months) and review sentiment (78% vs 59%). On price, ads, monetization model and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Red Sheet sells 7 in-app purchases, starting at $2.99 per month. 百人一首 簡単に暗記 asks for nothing beyond the download.

UpkeepUpdate frequency

百人一首 簡単に暗記 ships an update every 2 months, Red Sheet every 3 days. Both last shipped on October 24, 2026.

Scorecard4 real differences · 6 level
百人一首 簡単に暗記 versus Red Sheet: the parameters behind the verdict, then further details
Parameter百人一首 簡単に暗記Red Sheet
PriceFreeFree
Rating—4.2 (5 ratings) — better
Positive reviews59.1% of reviews77.8% of reviews — better
Number of ratings—5 — better
Update frequencyEvery 2 monthsEvery 3 days — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS14.213.0 — better
Further details — not scored
Size17 MB193 MB
Age rating4+4+
DeveloperRei MatsushitaFoodmenu.world Inc.

Customer experience

百人一首 簡単に暗記

Written reviews22 reviews
Positive59.1%
Neutral22.7%
Negative18.2%

Red Sheet

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews36 reviews
Positive77.8%
Neutral11.1%
Negative11.1%

In-app purchases

None

百人一首 簡単に暗記

No in-app purchases

7 purchases

Red Sheet

Subscriptions7
  • Monthly Special plan$2.991 Month
  • Monthly Super Saver Plan$2.991 Month
  • Monthly Value Plan$3.991 Month
Show 4 more
  • 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

Questions

Is 百人一首 簡単に暗記 free?
百人一首 簡単に暗記 is free to download, with no in-app purchases.
Is Red Sheet free?
Red Sheet is free to download, with in-app purchases available.
Do 百人一首 簡単に暗記 or Red Sheet have ads?
Both 百人一首 簡単に暗記 and Red Sheet show ads.
Which is updated more often, 百人一首 簡単に暗記 or Red Sheet?
百人一首 簡単に暗記 ships an update every 2 months, and Red Sheet every 3 days. Most recently, 百人一首 簡単に暗記 was updated on October 24, 2026 and Red Sheet on October 24, 2026.

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