# Rex vs Merge Alphabet Evolution

The clearest difference is review sentiment: Rex at 100% against Merge Alphabet Evolution's 25%. Merge Alphabet Evolution's advantage is in-app purchases (none vs 11) and update cadence (every 3 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Rex sells 11 one-off in-app purchases. Merge Alphabet Evolution asks for nothing beyond the download.

Merge Alphabet Evolution holds the better App Store score, 3.8 against 3.6. Both are backed by a comparable volume of ratings — 7 and 26 respectively. Written reviews complicate that: 100% of Rex's written reviews are positive against 25% of Merge Alphabet Evolution's, so the app with the better star average is not the one people write more warmly about.

Rex ships an update every 3 months, Merge Alphabet Evolution every 3 weeks. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Rex | Merge Alphabet Evolution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (7 ratings)](https://appshunter.io/ios/app/rex-mahjong/id1627077156/reviews) | **[3.8 (26 ratings)](https://appshunter.io/ios/app/merge-alphabet-evolution/id1665013585/reviews)** |
| Number of ratings | 7 | **26** |
| Positive reviews | **100.0% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 197 MB | 201 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Yso Corp](https://appshunter.io/developer/659815325) | [筱娴 傅](https://appshunter.io/developer/1617431619) |

## What reviewers say

### Rex

[App page](https://appshunter.io/ios/app/rex-mahjong/id1627077156)

Match three prehistoric creatures to evolve them into a more powerful form. Then, use your evolved dinosaurs to battle against another team in this strategic puzzle game.

**Highlights:** Match-3 evolution mechanic, Dinosaur-themed gameplay, Team-based battles, Strategic puzzle elements, Prehistoric creature evolution

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Speed Pack | $1.99 | one-time |
| Remove Ads | $2.99 | one-time |
| MegaBrachio | $3.99 | one-time |
| MegaSarco | $3.99 | one-time |
| MegaSpino | $3.99 | one-time |
| MegaRex | $3.99 | one-time |
| Speed Pack Plus | $3.99 | one-time |
| Pack MegaSarco | $5.99 | one-time |
| Pack MegaSpino | $5.99 | one-time |
| Pack MegaRex | $5.99 | one-time |
| Master Pack | $17.99 | one-time |


### Merge Alphabet Evolution

[App page](https://appshunter.io/ios/app/merge-alphabet-evolution/id1665013585)

Combine letters to create new ones and unlock more. Click to synthesize and enjoy the process of discovery. Can you reach the final letter?

**Highlights:** Synthesize letters, Unlock new letters, Click to get rewards, Simple gameplay, Discover letters up to Z

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rex free?

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

### Is Merge Alphabet Evolution free?

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

### Which has better reviews, Rex or Merge Alphabet Evolution?

Merge Alphabet Evolution is rated higher. Rex averages 3.6 out of 5 from 7 ratings, while Merge Alphabet Evolution averages 3.8 from 26 ratings.

### Do Rex or Merge Alphabet Evolution have ads?

Both Rex and Merge Alphabet Evolution show ads.

### Which is updated more often, Rex or Merge Alphabet Evolution?

Rex ships an update every 3 months, and Merge Alphabet Evolution every 3 weeks. Most recently, Rex was updated on October 3, 2026 and Merge Alphabet Evolution on October 19, 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.*