How Math Works vs 九九ドリル
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
How Math Works
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Math questions, sucn as slicing a cube at an angle, calculating when two brothers walking around a pond will meet, submerging a cube into a tank of water... are full of situations that are hard to recreate in real life. Because these situations are so difficult to picture concretely, many children end up feeling that math just isn't for them. "How Math Works" recreates these hard-to-picture situations on a tablet or smartphone, so children can actually see and touch them — helping them build a concrete, intuitive image of what's really going on. - Key Features Explore pages that recreate situations like slicing a cube at an angle or two brothers walking around a pond, where you can move the objects around and observe what happens. More than 30 experiences included! Draw scribbles directly on top of any page. (Scribbles are not saved — please use your device's screenshot feature if you'd like to keep them.) This app performs no network communication whatsoever. All features work completely offline. Nothing you do in the app affects anything outside of it, so children can explore and experiment to their heart's content. Using "Notebook" page, you can add figures introduced at experiences pages, draw your own notes, then print it so that you can keep what you see and find in your physical notebook or folder. - Please Note The content of this app has not been supervised by education professionals. We cannot guarantee any educational outcomes, so we ask parents to use it with their children under appropriate supervision. Privacy Policy: https://wholesale-piccolo-b79.notion.site/Privacy-Policy-b70867731a554631ba006586a89cda12 Terms of Use: https://wholesale-piccolo-b79.notion.site/Terms-of-Service-4e9212249a9046dbbe79746e3b9ee96e
九九ドリル
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くり返すうちに、九九が身につく。 九九ドリルは、メダル集めを楽しみながら九九を練習できるアプリです。段ごとに取り組めるので、覚え始めにも、苦手な段の復習にも使えます。 【3つのモードで練習】 「まえから」「うしろから」「ばらばら」の3つの順番で出題。順番に覚える練習から、どこから聞かれても答える練習へ進めます。 【メダルが次の目標に】 速さと正確さに応じて、銅・銀・金のメダルを獲得。メダルを集めると、新しい段や遊び方が解放されます。 【記録で上達を実感】 タイムや連続正解数で、自分の上達を確かめられます。九九全体を練習したいときは、全81問にも挑戦できます。
Screenshots
Verdict
The clearest difference is in-app purchases: 九九ドリル at none against How Math Works's 1. 九九ドリル also leads on update cadence (every 2 days vs every 6 days). How Math Works's advantage is ads (none vs shown). On price, device support 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
Both are free to download. How Math Works sells 1 in-app purchase, starting at $3.99 per month. 九九ドリル asks for nothing beyond the download.
How Math Works ships an update every 6 days, 九九ドリル every 2 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.
| Parameter | How Math Works | 九九ドリル |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days | Every 2 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 29 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Tsuyoshi Chujo | Holy Inc |
In-app purchases
How Math Works
- Premium Plan (Monthly)1 Month trial$3.991 Month
九九ドリル
No in-app purchases
Questions
Is How Math Works free?
Is 九九ドリル free?
Do How Math Works or 九九ドリル have ads?
Which is updated more often, How Math Works or 九九ドリル?
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