こえで はくちず vs How Math Works
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
こえで はくちず
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声で覚える、日本の地理 「こえではくちず」は、声で答える日本地理クイズアプリです。 白地図を見て、表示された問題の答えを声に出して回答します。 文字入力や選択肢は使わず、音声認識でテンポよく進行。 目・耳・声を使うことで、地名が自然と記憶に残ります。 ■ 遊び方 ・白地図を見て問題に挑戦 ・答えを声に出して回答 ・10問1セットでサクッとプレイ ■ 出題ジャンル ・都道府県・県庁所在地 ・都市・地形 ・山・川 ・湖・湾・平野 など ■ 特徴 ・音声認識で直感的に学習 ・白地図だから場所のイメージが身につく ・解説つきで理解が深まる ・1回10問、スキマ時間でも続けやすい ■ こんな人におすすめ ・中学受験生 ・日本地理を楽しく学びたい ・暗記が苦手 ・子どもの学習アプリを探している ・クイズ感覚で勉強したい 声に出すことで、地理はもっと身近になる。 「こえではくちず」で、新しい地理学習を体験してください。
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
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Verdict
The clearest difference is in-app purchases: こえで はくちず at none against How Math Works's 1. How Math Works's advantage is update cadence (every 6 days vs every 3 months). On price, ads, 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. こえで はくちず asks for nothing beyond the download.
こえで はくちず ships an update every 3 months, How Math Works every 6 days. The most recent releases landed on August 24, 2026 and September 23, 2026 respectively.
| Parameter | こえで はくちず | How Math Works |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 31 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Hideaki Yasukawa | Tsuyoshi Chujo |
In-app purchases
こえで はくちず
No in-app purchases
How Math Works
- Premium Plan (Monthly)1 Month trial$3.991 Month





