Flash Mental Math vs Abacus Lesson
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flash Mental Math
Practice mental arithmetic with various difficulty levels and custom modes. This app serves as a brain training tool to enhance calculation skills.
- Mental arithmetic practice
- Easy, normal, and difficult modes
- Customizable modes
- Brain training
- Calculation skill improvement
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Flash mental arithmetic practice app In addition to the easy, normal, and difficult modes, there are also custom modes. It can also be a brain training to improve mental arithmetic
Abacus Lesson
Master mental arithmetic and abacus calculation with this comprehensive app. Learn efficient finger movements and mental math techniques to solve complex problems quickly. Enjoy a customizable and ad-free learning experience with progress tracking.
- Abacus lessons
- Mental arithmetic training
- Finger movement focus
- Customizable abacus color
- Screen orientation options
- Trophy system for goals
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356+735+195, 23×89, 5626÷58, Can you solve each in 5 sec by mental arithmetic? The goal of this app is to learn abacus and solve these problems in mental arithmetic within 5 seconds. All lessons of the abacus lesson series, which have been highly evaluated all over the world, are recorded. The lessons have been reworked in a more polite and easy-to-understand. In addition, we have added unique training methods such as training focusing on finger movements and mental arithmetic training to improve mental arithmetic in order to learn abacus more efficiently. And various improvements have been made. - Either vertical screen or horizontal screen can be selected. - The position and size of the abacus and window can be freely laid out. - No ads. - Added sound variations. Volume control can also be finely set. - The color of the abacus can be set freely. - Earn a trophy by achieving the goal. - Smoother operability by optimizing the app. ◆Support web page https://hirokuma.blog/?p=4427
Screenshots
Verdict
The clearest difference is in-app purchases: Flash Mental Math at none against Abacus Lesson's 1. Abacus Lesson's advantage is ads (none vs shown) and update cadence (every 2 days vs every 3 months). On price, rating 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. Abacus Lesson sells 1 one-off in-app purchase. Flash Mental Math asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.7 for Flash Mental Math against 4.8 for Abacus Lesson. That said, the two scores are not equally well evidenced: Abacus Lesson has 95 ratings behind it against 18, so its average is the more settled of the two.
Flash Mental Math ships an update every 3 months, Abacus Lesson every 2 days. The most recent releases landed on August 3, 2026 and September 21, 2026 respectively.
| Parameter | Flash Mental Math | Abacus Lesson |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (18 ratings) | 4.8 (95 ratings) — better |
| Positive reviews | — | 75.0% of reviews |
| Number of ratings | 18 | 95 — better |
| Update frequency | Every 3 months | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 153 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryouhei Azuma | Hirokazu Komatsu |
Customer experience
Flash Mental Math
Abacus Lesson
In-app purchases
Flash Mental Math
No in-app purchases
Abacus Lesson
- Unlock all contents$5.99
Questions
Is Flash Mental Math free?
Is Abacus Lesson free?
Which has better reviews, Flash Mental Math or Abacus Lesson?
Do Flash Mental Math or Abacus Lesson have ads?
Which is updated more often, Flash Mental Math or Abacus Lesson?
Other comparisons
