フラッシュ暗算（あそんでまなぶ！シリーズ） vs Abacus Lesson
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
フラッシュ暗算（あそんでまなぶ！シリーズ）
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画面に次々と表示される数字を足して合計を答えるフラッシュ暗算アプリです。 【トレーニングモード】 トレーニングモードでは以下の設定を変えてあそぶことが出来ます。 ・桁数 ・表示間隔 ・出題数 簡単な問題から難しい問題までどなたでも遊んでいただけます。 【チャレンジモード】 チャレンジモードでは４つの難易度でランキングに挑戦できます。 自分に合った難易度でランキング上位を目指しましょう！
Abacus Lesson
Learn multiplication using a virtual abacus. This app teaches a simple and fast method for calculating multiplication, emphasizing the mental calculation benefits of the abacus over digital calculators.
- Virtual abacus for multiplication
- Simple and fast calculation methods
- Focus on mental calculation skills
- Step-by-step multiplication lessons
- Suitable for beginners
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An abacus is named "Soroban" in Japan. Do you know what an abacus is? The abacus is very simple calculator used in China, Japan, Korea and so on. Some people may say "Isn't it an unnecessary tool if you have a calculator such as a smartphone?". Answer would be "No". The biggest difference between electric calculators and the abacus is whether you need to hold it in your hand when calculating. Because of its simplicity, you will be able to easily use the abacus in your mind. In the app, we will explain simple and fast method of the multiplication using the abacus. To learn multiplication, it is essential to be able to add with an abacus. If you are new to addition and subtraction, we recommend that You first learn with the following app. https://apps.apple.com/us/app/abacus-lesson-add-sub/id1526785916 This app will give you the skill of calculation of multiplication.
Screenshots
Verdict
The clearest difference is review sentiment: Abacus Lesson at 100% against フラッシュ暗算（あそんでまなぶ！シリーズ）'s 60%. Abacus Lesson also leads on update cadence (every 2 weeks vs every 32 months). フラッシュ暗算（あそんでまなぶ！シリーズ）'s advantage is iOS requirement (9.0 vs 11.0). On price, ads, in-app purchases and device support 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. フラッシュ暗算（あそんでまなぶ！シリーズ） sells 2 one-off in-app purchases and Abacus Lesson sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
フラッシュ暗算（あそんでまなぶ！シリーズ） ships an update every 32 months, Abacus Lesson every 2 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | フラッシュ暗算（あそんでまなぶ！シリーズ） | Abacus Lesson |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (15 ratings) — better |
| Positive reviews | 60.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 15 — better |
| Update frequency | Every 32 months | Every 2 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 11.0 |
| Further details — not scored | ||
| Size | 30 MB | 138 MB |
| Age rating | 4+ | 4+ |
| Developer | UNI-TY INC. | Hirokazu Komatsu |
Customer experience
フラッシュ暗算（あそんでまなぶ！シリーズ）
Abacus Lesson
In-app purchases
フラッシュ暗算（あそんでまなぶ！シリーズ）
- 広告非表示$2.99
- 回数制限解除$2.99
Abacus Lesson
- Donation Lv1 for hiding Ad$1.99
- Donation Lv2 for hiding Ad$3.99
- Donation Lv3 for hiding Ad$8.99
Questions
Is フラッシュ暗算（あそんでまなぶ！シリーズ） free?
Is Abacus Lesson free?
Do フラッシュ暗算（あそんでまなぶ！シリーズ） or Abacus Lesson have ads?
Which is updated more often, フラッシュ暗算（あそんでまなぶ！シリーズ） or Abacus Lesson?
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