# Merge Brain vs Doudy Run

The clearest difference is in-app purchases: Doudy Run at none against Merge Brain's 9. Doudy Run also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Merge Brain sells 9 one-off in-app purchases. Doudy Run asks for nothing beyond the download.

Merge Brain ships an update every 6 weeks, Doudy Run every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Merge Brain | Doudy Run |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (185 ratings)](https://appshunter.io/ios/app/merge-brain-2248/id6449523076/reviews)** | — |
| Number of ratings | **185** | — |
| Positive reviews | 54.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 278 MB | 22 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SUPERBOX. Inc](https://appshunter.io/developer/1165756567) | [Meyado Studio](https://appshunter.io/developer/6777127274) |

## What reviewers say

### Merge Brain

[App page](https://appshunter.io/ios/app/merge-brain-2248/id6449523076)

A minimalist puzzle game where you link blocks with the same numbers to create higher numbers. Sharpen your mind and concentration with increasingly challenging levels, aiming for the highest score.

**Highlights:** Link same numbered blocks, Create higher number blocks, Minimalist and modern design, Simple controls, challenging gameplay, Automatic data save, World ranking, Infinite time

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diamond 1000 | $0.99 | one-time |
| Diamond 2500 | $2.99 | one-time |
| Remove Ads | $4.99 | one-time |
| Diamond 6000 | $4.99 | one-time |
| Diamond Piggy Bank | $4.99 | one-time |
| Diamond 13000 | $9.99 | one-time |
| Diamond 35000 | $29.99 | one-time |
| Diamond 60000 | $49.99 | one-time |
| Diamond 100000 | $99.99 | one-time |

**What reviewers like**

- 👍 Fun and enjoyable gameplay
- ✅ No Wi-Fi required
- 👍 Good amount of ads (for some)
- 💡 Suggestion for higher number tiles (2048, 4096, 8192)
- 🚀 Reached high scores (Septillion, Undecillion)

**What reviewers complain about**

- ⏰ Stingy 24-hour reward timer
- 🐛 Game freezes after update
- 🐛 Game freezes during long play sessions
- 🐛 Game lagging
- 🐛 Paid movements reversed overnight

**Reported bugs**

- Game gets stuck and screen freezes for a minute or two after recent update
- Game freezes every time playing for long periods
- Game keeps lagging
- Paid Movements reversed overnight
- Ad pops up and cannot be closed, requiring game exit

**Requested features**

- Update reward timer to standard daily reset
- Add Infinity tile
- Make game more fun with updates
- Change 2K, 4K, 8K to 2048, 4096, 8192
- Add an end goal or finish line to the game


### Doudy Run

[App page](https://appshunter.io/ios/app/doudy-run/id6800289376)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Merge Brain free?

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

### Is Doudy Run free?

Doudy Run is free to download, with no in-app purchases.

### Do Merge Brain or Doudy Run have ads?

Merge Brain shows ads; Doudy Run does not.

### Which is updated more often, Merge Brain or Doudy Run?

Merge Brain ships an update every 6 weeks, and Doudy Run every 3 weeks. Most recently, Merge Brain was updated on October 24, 2026 and Doudy Run on October 25, 2026.

---

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