Comparison

FlipShadow vs 日本史ニホンシア

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

Head to head
About

FlipShadow

Features
Read full description

Learn Languages Through Sentence Memorization Memorizing words alone won't help you speak. Studying grammar doesn't guarantee fluency in real conversations. Why? Because you haven't trained your brain to "retrieve" sentences. This app combines flashcard retrieval training with a scientific spaced repetition algorithm to make memorized sentences come out naturally in conversation. ■ Key Features ▸ Flashcard Retrieval Training Practice retrieving sentences from your brain. Memorized sentences will automatically come out in real conversations. ▸ Scientific Spaced Repetition Algorithm (Anki-style) Automatically calculates your optimal study schedule for efficient memorization. Review at the perfect timing based on the forgetting curve. ▸ Choose Your Own Sentences Memorize only the sentences you'll actually use. Build personalized learning decks for your specific needs. ▸ Learning Statistics & Progress Tracking Monitor your learning status with detailed statistics. See at a glance how much you've memorized and retained. ▸ iCloud Sync Study seamlessly across iPhone, iPad, and Mac. Your learning progress syncs automatically across all devices. ▸ CSV File Import Easily import your own learning materials via CSV files. Materials created in Excel or Google Sheets work instantly. ■ Perfect For - Those who know words but can't speak - Those who studied grammar but struggle in real conversations - Anyone who wants to memorize efficiently - Anki users who found it too complex - Learners who want to choose only useful sentences ■ Why Memorize Sentences? Word memorization: "apple" = apple → "I ate an apple" doesn't come out automatically in conversation Sentence memorization: "I ate an apple yesterday" → The entire sentence comes out naturally when the situation arises When you memorize sentences, grammar, word order, and expressions stick together as chunks. This is real speaking ability. ■ What is Spaced Repetition? A method of reviewing at optimal intervals based on the human forgetting curve. - After 1 day → 3 days → 7 days → 14 days... Repeating with increasing intervals converts information into long-term memory. The app automatically calculates "today's review cards," so you just need to open the app and study every day. ■ Start Now Experience memorized sentences coming out naturally. Enjoy the pleasure of efficient memorization through scientific methods. Start now. - Terms of use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

日本史ニホンシア

Features
Read full description

「日本史、全然覚えられない」 「教科書は年号がバラバラで、流れが掴めない」 「一問一答を買ったけど、ちまちま進めて結局続かなかった」 ニホンシアは、そんな受験生のための日本史学習ゲームです。 ―――――――――――――――― ■ 暗記じゃなく、「流れ」で覚える ―――――――――――――――― 歴史は年号と用語の羅列ではなく、ストーリーです。 ニホンシアでは「ニホンシア」というひとつの島を舞台に、飛鳥から昭和まで、時代のエリアをめぐりながら学習を進めます。マップを進むほど、出来事どうしのつながりが見えてきます。 ―――――――――――――――― ■ 1回5問・約1分。通学中でも回せる ―――――――――――――――― 学習は1セッション5問だけ。 「思い出す」「つなぐ」「使う」の順に問題が出るので、用語の暗記で終わらず、入試で問われる因果関係や史料の読み取りまで一気通貫で練習できます。 ―――――――――――――――― ■ 忘れたころに、ちょうど復習が来る ―――――――――――――――― 間違えた問題・覚えたての問題は、記憶が薄れるタイミングに合わせて自動で復習に出ます(間隔反復方式)。 「星3レベルの単語がポロポロ抜けてる」――そんな取りこぼしを仕組みで防ぎます。 ―――――――――――――――― ■ どこまで定着したかが、ひと目でわかる ―――――――――――――――― 章ごとの定着状況はマップ上に表示。 「きょうのおすすめ」が次にやるべき場所を教えてくれるので、何から手をつけていいか迷いません。 ―――――――――――――――― ■ 主な機能 ―――――――――――――――― ・全17章・575問(全範囲を薄く一周+幕末〜明治を深く) ・1回5問のクイズ形式(回答→正誤→解説) ・間隔反復による自動復習 ・章ごとの定着マップと「きょうのおすすめ」 ・学習を中断しても、続きからすぐ再開 ・広告表示はありません。学習の途中で広告に中断されることはありません ―――――――――――――――― ■ こんな人におすすめ ―――――――――――――――― ・大学受験で日本史探究・歴史総合を使う高校生・浪人生 ・共通テストの日本史対策を始めたい人 ・参考書や一問一答が続かなかった人 ・定期テスト前に効率よく復習したい人 ―――――――――――――――― ■ 価格 ―――――――――――――――― ・おためし分は無料でプレイできます ・Pro(全17章・全機能):月額980円/年額4,900円 -- 利用規約:https://tanirell.com/legal/nihonsia/terms-of-service プライバシーポリシー:https://tanirell.com/legal/nihonsia/privacy-policy 特定商取引法に基づく表示:https://tanirell.com/legal/nihonsia/tokushoho

Screenshots

FlipShadow4 screens
日本史ニホンシア4 screens

Verdict

The call

The clearest difference is update cadence: 日本史ニホンシア at daily against FlipShadow's every 6 days. FlipShadow's advantage is device support (3 vs 1). On price, ads, in-app purchases 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. FlipShadow sells 1 one-off in-app purchase and 日本史ニホンシア sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

FlipShadow ships an update every 6 days, 日本史ニホンシア daily. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 4 level
FlipShadow versus 日本史ニホンシア: the parameters behind the verdict, then further details
ParameterFlipShadow日本史ニホンシア
PriceFreeFree
Update frequencyEvery 6 daysDaily — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS17.617.0 — better
Further details — not scored
Size4 MB135 MB
Age rating4+4+
DeveloperJong Seon LeeYUKIHIRO TANIGUCHI

In-app purchases

1 purchases

FlipShadow

One-time1
  • Lifetime Subsription$9.99
2 purchases

日本史ニホンシア

Subscriptions2
  • ニホンシア Pro 月額プラン$5.991 Month
  • ニホンシア Pro 年額プラン$29.991 Year

Questions

Is FlipShadow free?
FlipShadow is free to download, with in-app purchases available.
Is 日本史ニホンシア free?
日本史ニホンシア is free to download, with in-app purchases available.
Do FlipShadow or 日本史ニホンシア have ads?
Neither FlipShadow nor 日本史ニホンシア shows ads.
Which is updated more often, FlipShadow or 日本史ニホンシア?
FlipShadow ships an update every 6 days, and 日本史ニホンシア daily. Most recently, FlipShadow was updated on October 24, 2026 and 日本史ニホンシア on October 25, 2026.

Other comparisons