高校数学 数I〜数C 解法の最初の一手 vs Structura
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
高校数学 数I〜数C 解法の最初の一手
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「この問題、まず何をする?」が一瞬で出てくる頭をつくる。 「初手」は、数学の問題を見た瞬間に“解法の最初の一手”を思い浮かべる力を、反射レベルまで鍛えるアプリです。完答は求めません。「まず何をするか」だけを、たくさん浴びて体に焼き付けます。 数学I・Aから数学II・B、さらに数学III・数学Cまで。理系受験でつかう範囲の「初手」がこの1本にそろいました。680をこえるパターン・4,500問以上を、1問数十秒のテンポで浴びられます。 初手は思い出せたのに、公式そのものがうろ覚えで手が止まる——そこを埋める「公式・定理集」も入っています。 ■ こんな人に ・公式は知ってるのに、問題を前にすると手が止まる ・応用問題で「どこから手をつければ?」と固まる ・共通テストや入試の過去問で、最初の一歩が思いつかない ・数III・数Cの極限/微分積分でも「まず何をするか」を反射で出したい ・短時間でテンポよく数学の感覚を鍛えたい ■ 特長 ・問題を見て「初手」を思い浮かべ、答え合わせ。1問数十秒のテンポ ・解けなかった所は責めない。「もう一度」にたまって、あとでやり直せる ・「鉄則帳」で覚えるべき定石を一覧。必須→発展まで自分のペースで ・「公式・定理集」で数I〜数Cの公式・定理を200件超、単元ごとに引ける。使いどころつき、必要なものには成立条件も ・問題と初手をセットで流し見する「ながめる」モード ・基礎の展開・因数分解から数III・数Cまで、同じ「初手」の考え方でひとつながり ■ 収録(数I・A・II・B・III・C — 理系受験でつかう範囲がまるごと) ・数学I+A: 数と式/集合と命題/2次関数/図形と計量(三角比)/データの分析/場合の数・確率/図形の性質/整数の性質 ・数学II+B: 式と証明/複素数と方程式/図形と方程式/三角関数/指数関数・対数関数/微分法・積分法/数列/統計的な推測/ベクトル ・数学III: 極限/微分法/積分法 ・数学C: 複素数平面/平面上の曲線(二次曲線・媒介変数・極座標) ※ ベクトルは新課程では数Cですが、受験の定番範囲として収録しています ※ 展開・因数分解は高校範囲の土台として、無料のウォームアップに収録しています ■ 無料と有料 ・一覧・鉄則帳・公式・定理集はずっと無料 ・カードは、入口の「数と式」なら全部、ほかの単元も単元ごとに最初に開いた3枚まで無料で見られる ・全単元を自分の手で解いて記録に残すには、一度きりの買い切りで解放
Structura
Learn chemical reactions by playing a falling-block puzzle game. Combine elements and ions to build compounds, with over 350 reactions covered. Practice recall with quizzes and tests, and experiment freely with all elements.
- Falling-block puzzle gameplay
- Element and ion combination
- 356 chemical reactions covered
- 46 learning stages
- In-game quizzes and tests
- Free experiment mode
- Visual representation of compounds
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LEARN CHEMICAL REACTIONS WITH A FALLING-BLOCK PUZZLE Drop elements and ions, place them side by side, and they combine. H plus O makes −OH. Add another H and you have H₂O. A compound forms only when the bonds and charges add up. Instead of turning textbook pages, you build each reaction with your own hands. WHAT'S INSIDE 356 reactions across inorganic, organic and polymer chemistry (308 in the Codex), in 46 stages. - From atoms to molecules - Making gases, and the halogens - Metals, oxides and industrial methods (contact process, Ostwald process, ammonia-soda process, blast furnace) - Acids, bases, neutralization and salts - Redox and ionization tendency (permanganate, dichromate, iodometric titration) - Metal ion precipitates and complex ions - Aliphatic compounds (oxidizing alcohols, esterification, silver mirror test, iodoform test) - Aromatic compounds (nitration, sulfonation, diazotization, azo dyes, cumene process) - Polymers (sugars, amino acids, protein tests, resins, rubber, vinylon) This app is about reactions. It does not cover calculation topics such as moles, equilibrium, electrochemistry, thermochemistry or crystal lattices. The content follows the Japanese high school chemistry curriculum, so some topics and terms may differ from your course. BUILT TO BE SEEN Benzene is drawn as a hexagon, glucose as a ring, starch as linked rings. Precipitates sink to the bottom and gases escape upward, in their real colors. PRACTICE RECALLING - A 3-question quiz after each stage, with the product hidden - A Test mode in the Codex that masks the products - Reactions you miss come back in later quizzes, and their materials fall more often SET UP THE CONDITIONS YOURSELF Heat, electrolysis, light and catalysts are devices you use on the whole flask. You decide when to use them. FREE EXPERIMENT MODE With the full unlock, choose what falls, in the order you like, and try your own combinations. No targets and no material limit. MEET THE ELEMENTS Each of the 46 stages introduces a character who teaches the key point of that topic, in a short conversation with Mol, an apprentice chemist. PRICING Units 1-3 (14 stages, 91 Codex entries) are free. A one-time purchase unlocks everything else. - No additional charges - No subscriptions - No ads - No gacha - No stamina
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Verdict
The clearest difference is iOS requirement: 高校数学 数I〜数C 解法の最初の一手 at 15.0 against Structura's 17.0. On price, update cadence, ads and in-app purchases 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. 高校数学 数I〜数C 解法の最初の一手 sells 1 one-off in-app purchase and Structura sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
高校数学 数I〜数C 解法の最初の一手 ships an update weekly, Structura every 4 days. The most recent releases landed on October 28, 2026 and November 8, 2026 respectively.
| Parameter | 高校数学 数I〜数C 解法の最初の一手 | Structura |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Weekly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 22 MB | 100 MB |
| Age rating | 4+ | 4+ |
| Developer | Gen Nakanishi | SNAPLACE |
In-app purchases
高校数学 数I〜数C 解法の最初の一手
- 全解放(すべての初手)$4.99
Structura
- Unlock All Units$2.99
Questions
Is 高校数学 数I〜数C 解法の最初の一手 free?
Is Structura free?
Do 高校数学 数I〜数C 解法の最初の一手 or Structura have ads?
Which is updated more often, 高校数学 数I〜数C 解法の最初の一手 or Structura?
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