# KIDS SUM vs Matsy Abacus

The clearest difference is review sentiment: Matsy Abacus at 100% against KIDS SUM's 31%. Matsy Abacus also leads on rating (4.9 vs 3.8). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. KIDS SUM sells 3 in-app purchases, starting at $9.99 per month and Matsy Abacus sells 5 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Matsy Abacus holds the better App Store score, 4.9 against 3.8. Both are backed by a comparable volume of ratings — 83 and 30 respectively. Written reviews point the same way: 31% of KIDS SUM's written reviews are positive against 100% of Matsy Abacus's.

KIDS SUM ships an update every 2 months, Matsy Abacus monthly. The most recent releases landed on October 9, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | KIDS SUM | Matsy Abacus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (83 ratings)](https://appshunter.io/ios/app/kids-sum-up-happytouch/id563815972/reviews) | **[4.9 (30 ratings)](https://appshunter.io/ios/app/matsy-abacus/id1439473353/reviews)** |
| Number of ratings | **83** | 30 |
| Positive reviews | 31.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 331 MB | 66 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Happy Touch Kids Learning Games for Toddlers GmbH](https://appshunter.io/developer/447370352) | [IGOR ILIN](https://appshunter.io/developer/1439473352) |

## What reviewers say

### KIDS SUM

[App page](https://appshunter.io/ios/app/kids-sum-up-happytouch/id563815972)

This app offers a playful way for children aged 3 and up to learn numbers and counting skills using an interactive abacus. It includes tasks with rewards and is developed with input from parents and children.

**Highlights:** Interactive abacus for learning numbers, Counting from 1 to 100, Task-based learning with animation rewards, Developed with parent and child input, Suitable for ages 3-99

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Count and Add | $9.99 | per month |
| Count and Add | $29.99 | per year |
| FULL VERSION | $29.99 | one-time |


### Matsy Abacus

[App page](https://appshunter.io/ios/app/matsy-abacus/id1439473353)

This educational app helps children master mental arithmetic through engaging games and adaptive trainers. It utilizes abacus techniques, flash cards, and proven methods to boost calculation speed, focus, and memory. Suitable for students, parents, and teachers seeking effective mental math tools.

**Highlights:** Abacus flash cards, Multiplication and division trainers, Mental math exercises, Brother/Friend techniques, 5050 mode, Speed & accuracy games, Adaptive difficulty

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mental Workout Premium Month | $2.99 | per month |
| Premium (6 months) | $8.99 | per 6 months |
| Matsy Premium Year | $9.99 | per year |
| Mental Workout Premium Year | $14.99 | per year |
| Mental Workout Premium | $7.99 | one-time |


## Frequently asked questions

### Is KIDS SUM free?

KIDS SUM is free to download, with in-app purchases available.

### Is Matsy Abacus free?

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

### Which has better reviews, KIDS SUM or Matsy Abacus?

Matsy Abacus is rated higher. KIDS SUM averages 3.8 out of 5 from 83 ratings, while Matsy Abacus averages 4.9 from 30 ratings.

### Do KIDS SUM or Matsy Abacus have ads?

Neither KIDS SUM nor Matsy Abacus shows ads.

### Which is updated more often, KIDS SUM or Matsy Abacus?

KIDS SUM ships an update every 2 months, and Matsy Abacus monthly. Most recently, KIDS SUM was updated on October 9, 2026 and Matsy Abacus 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.*