# Category Topic vs Math Merge

Category Topic and Math Merge both sit at 5.0 stars, but that hides the real split: 63% of Math Merge's written reviews are positive against 0% of Category Topic's. Math Merge also leads on in-app purchases (none vs 13) and ads (none vs shown). Category Topic's advantage is ratings volume (173 vs 39). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. Category Topic sells 13 one-off in-app purchases. Math Merge asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Category Topic against 4.9 for Math Merge. Both are backed by a comparable volume of ratings — 173 and 39 respectively. Written reviews are what separate them: 0% of Category Topic's written reviews are positive against 63% of Math Merge's.

Category Topic ships an update every 9 days, Math Merge weekly. Both last shipped on October 29, 2026.

## The numbers

| Metric | Category Topic | Math Merge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (173 ratings)](https://appshunter.io/ios/app/category-topic-mahjong-sort/id6794221849/reviews)** | [4.9 (39 ratings)](https://appshunter.io/ios/app/math-merge-brain-puzzle/id6797260263/reviews) |
| Number of ratings | **173** | 39 |
| Positive reviews | 0.0% of reviews | **62.5% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | — | **#181** |
| Size | 377 MB | 226 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 12+ |
| Developer | [SAMZU LIMITED](https://appshunter.io/developer/1820834040) | [Smart Project GmbH](https://appshunter.io/developer/1462157824) |

## What reviewers say

### Category Topic

[App page](https://appshunter.io/ios/app/category-topic-mahjong-sort/id6794221849)

Engage in a relaxing tile-sorting puzzle game inspired by mahjong. Match cute tiles to their correct categories across a vast array of topics. Progress through challenging levels that test your planning and observation skills.

**Highlights:** Mahjong-inspired tile sorting gameplay, Diverse topics and categories, Hundreds of brain-training levels, Cute and colorful tile designs, Helpful boosters, Satisfying animations

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

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coin Pack 1 | $1.99 | one-time |
| Revive | $4.99 | one-time |
| No Ads Package 1 | $7.99 | one-time |
| Coin Pack 2 | $7.99 | one-time |
| No Ads Package 2 | $9.99 | one-time |
| Mini Bundle | $9.99 | one-time |
| No Ads Bundle | $14.99 | one-time |
| Coin Pack 3 | $14.99 | one-time |
| Mega Bundle | $19.99 | one-time |
| Ultra Bundle | $29.99 | one-time |
| Coin Pack 4 | $29.99 | one-time |
| Coin Pack 5 | $54.99 | one-time |
| Coin Pack 6 | $99.99 | one-time |


### Math Merge

[App page](https://appshunter.io/ios/app/math-merge-brain-puzzle/id6797260263)

**Currently charting:** #181 Top Free · Card (US App Store)

Engage your mind with a unique card-sorting puzzle that combines logic and simple math equations. Solve problems, group matching cards, and enjoy a calming, satisfying brain-training experience.

**Highlights:** Original card-sorting gameplay, Solve simple equations, Group matching cards, Discover hidden patterns, Relaxing puzzle experience, Challenging levels

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

**In-app purchases:** none


## Frequently asked questions

### Is Category Topic free?

Category Topic is free to download, with in-app purchases available.

### Is Math Merge free?

Math Merge is free to download, with no in-app purchases.

### Which has better reviews, Category Topic or Math Merge?

Category Topic is rated higher. Category Topic averages 5.0 out of 5 from 173 ratings, while Math Merge averages 4.9 from 39 ratings.

### Do Category Topic or Math Merge have ads?

Category Topic shows ads; Math Merge does not.

### Which is updated more often, Category Topic or Math Merge?

Category Topic ships an update every 9 days, and Math Merge weekly. Most recently, Category Topic was updated on October 29, 2026 and Math Merge on October 29, 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.*