# Mahjong Challenges vs Undersea Mahjong

The clearest difference is ads: Mahjong Challenges at none against Undersea Mahjong's shown. Undersea Mahjong's advantage is update cadence (every 3 months vs every 34 months) and review sentiment (43% vs 29%). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Mahjong Challenges sells 6 one-off in-app purchases and Undersea Mahjong sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for Mahjong Challenges against 4.7 for Undersea Mahjong. Both are backed by a comparable volume of ratings — 4 and 3 respectively. Written reviews are what separate them: 29% of Mahjong Challenges's written reviews are positive against 43% of Undersea Mahjong's.

Mahjong Challenges ships an update every 34 months, Undersea Mahjong every 3 months. The most recent releases landed on October 23, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Mahjong Challenges | Undersea Mahjong |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/mahjong-challenges/id636879476/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/undersea-mahjong/id748612885/reviews) |
| Number of ratings | **4** | 3 |
| Positive reviews | 29.4% of reviews | **42.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 34 months | **Every 3 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 38 MB | 66 MB |
| Requires iOS | 13 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jose Varela](https://appshunter.io/developer/336500035) | [Code This Lab srl](https://appshunter.io/developer/377003842) |

## What reviewers say

### Mahjong Challenges

[App page](https://appshunter.io/ios/app/mahjong-challenges/id636879476)

Experience the classic Mahjong solitaire game with a timed challenge. Remove all tiles by matching pairs, utilizing unlimited undo, hints, and shuffles. Compete for high scores on 300 unique board layouts.

**Highlights:** 300 board layouts, Infinite Undo, Hints, Shuffle, Adjustable tile illumination, HD graphics, Guaranteed solvable puzzles, Score based on time, High score tracking

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 extra lives | $1.99 | one-time |
| Undo button | $1.99 | one-time |
| Hint | $1.99 | one-time |
| Double  time | $1.99 | one-time |
| Shuffle | $1.99 | one-time |
| Set of 5 lives | $2.99 | one-time |


### Undersea Mahjong

[App page](https://appshunter.io/ios/app/undersea-mahjong/id748612885)

A classic matching puzzle game where you clear the board by pairing identical tiles. Explore various themes and unlock new game modes to keep the challenge fresh. Compete with others through leaderboards and achievements.

**Highlights:** Classic Mahjong matching gameplay, Multiple game modes including Memory, Over 30 themed layouts, Three difficulty levels, Multi-language support, Leaderboards and achievements

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| New 7 Wonders Layout | $0.99 | one-time |
| Disable Ads | $0.99 | one-time |
| Six New Layouts | $0.99 | one-time |
| New Six Winter Layout | $0.99 | one-time |
| Coins Pack | $1.99 | one-time |
| 100 coins, disable Ads, your name in the credits! | $2.99 | one-time |


## Frequently asked questions

### Is Mahjong Challenges free?

Mahjong Challenges is free to download, with in-app purchases available.

### Is Undersea Mahjong free?

Undersea Mahjong is free to download, with in-app purchases available.

### Which has better reviews, Mahjong Challenges or Undersea Mahjong?

Mahjong Challenges is rated higher. Mahjong Challenges averages 4.8 out of 5 from 4 ratings, while Undersea Mahjong averages 4.7 from 3 ratings.

### Do Mahjong Challenges or Undersea Mahjong have ads?

Undersea Mahjong shows ads; Mahjong Challenges does not.

### Which is updated more often, Mahjong Challenges or Undersea Mahjong?

Mahjong Challenges ships an update every 34 months, and Undersea Mahjong every 3 months. Most recently, Mahjong Challenges was updated on October 23, 2026 and Undersea Mahjong on October 26, 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.*