# Know Abacus vs Mental Math

The clearest difference is ads: Mental Math at none against Know Abacus's shown. Mental Math also leads on rating (5.0 vs 4.7) and update cadence (every 3 weeks vs every 2 months). Know Abacus's advantage is ratings volume (67 vs 5) and iOS requirement (11.0 vs 17.1). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Know Abacus sells 1 one-off in-app purchase and Mental Math sells 10 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Mental Math holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Know Abacus has 67 ratings behind it against 5, so its average is the more settled of the two.

Know Abacus ships an update every 2 months, Mental Math every 3 weeks. The most recent releases landed on July 6, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Know Abacus | Mental Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (67 ratings)](https://appshunter.io/ios/app/know-abacus/id641867438/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/mental-math-mathee/id6502719157/reviews)** |
| Number of ratings | **67** | 5 |
| Positive reviews | 96.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 28 MB | 28 MB |
| Requires iOS | **11.0** | 17.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kittipong Mungnirun](https://appshunter.io/developer/488058533) | [Andrey Lebedev](https://appshunter.io/developer/636486462) |

## What reviewers say

### Know Abacus

[App page](https://appshunter.io/ios/app/know-abacus/id641867438)

This app teaches children how to use an abacus for various math operations. It covers counting, addition, subtraction, multiplication, and division, helping to develop their mathematical abilities and brain potential. It offers multiple learning modes and customization options.

**Highlights:** Abacus counting, Addition and subtraction (1 & 2 digits), Multiplication and division (1-2 digits), Mental math practice, Review and random lessons, Customizable abacus (color, touch), Multiple languages

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-mathee/id6502719157)

Enhance your arithmetic abilities with daily math challenges. This app offers over 30 difficulty levels, personalized exercises, and progress tracking to help users of all ages improve their calculation speed and accuracy.

**Highlights:** 30+ difficulty levels, Personalized exercises, Progress tracking, Quick sessions, User-friendly design, Engaging and interactive

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plus | $4.99 | per 7 days |
| Premium Plus | $4.99 | per 7 days |
| Premium Plus | $5.99 | per month |
| Premium Plus | $11.99 | per 3 months |
| Premium Plus | $14.99 | per year |
| Premium Plus | $17.49 | per year |
| Premium Plus | $24.99 | per year |
| Premium Plus | $24.99 | per year |
| Premium Plus | $39.99 | per year |
| Premium Plus | $39.99 | one-time |


## Frequently asked questions

### Is Know Abacus free?

Know Abacus is free to download, with in-app purchases available.

### Is Mental Math free?

Mental Math is free to download, with in-app purchases available.

### Which has better reviews, Know Abacus or Mental Math?

Mental Math is rated higher. Know Abacus averages 4.7 out of 5 from 67 ratings, while Mental Math averages 5.0 from 5 ratings.

### Do Know Abacus or Mental Math have ads?

Know Abacus shows ads; Mental Math does not.

### Which is updated more often, Know Abacus or Mental Math?

Know Abacus ships an update every 2 months, and Mental Math every 3 weeks. Most recently, Know Abacus was updated on July 6, 2026 and Mental Math on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*