# Error 503 vs Merge & Roll

The clearest difference is ads: Error 503 at none against Merge & Roll's shown. Error 503 also leads on update cadence (every 2 days vs every 3 weeks). Merge & Roll's advantage is iOS requirement (13.0 vs 15.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Error 503 ships an update every 2 days, Merge & Roll every 3 weeks. The most recent releases landed on October 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Error 503 | Merge & Roll |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/merge-and-roll/id6760873326/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 3 weeks |
| Monetization | — | Ad-supported |
| Size | 182 MB | 344 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 12+ |
| Developer | [Ana Goncalves](https://appshunter.io/developer/1852468740) | [金发 李](https://appshunter.io/developer/1683239323) |

## What reviewers say

### Error 503

[App page](https://appshunter.io/ios/app/error-503/id6755182586)

**Features:** macOS Compatibility

**In-app purchases:** none


### Merge & Roll

[App page](https://appshunter.io/ios/app/merge-and-roll/id6760873326)

Control a rolling ball to grow by colliding with number balls. Devour smaller balls while avoiding larger opponents. Simple controls make it easy to learn and compete to be the last one rolling.

**Highlights:** Roll and grow your ball, Collide with number balls, Devour smaller balls, Avoid larger opponents, Simple one-touch controls

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

**In-app purchases:** none


## Frequently asked questions

### Is Error 503 free?

Error 503 is free to download, with no in-app purchases.

### Is Merge & Roll free?

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

### Do Error 503 or Merge & Roll have ads?

Merge & Roll shows ads; Error 503 does not.

### Which is updated more often, Error 503 or Merge & Roll?

Error 503 ships an update every 2 days, and Merge & Roll every 3 weeks. Most recently, Error 503 was updated on October 9, 2026 and Merge & Roll on October 1, 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.*