# Roman Math vs Merge Knife

The clearest difference is in-app purchases: Roman Math at none against Merge Knife's 6. Roman Math also leads on ads (none vs shown) and update cadence (every 5 days vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Merge Knife sells 6 one-off in-app purchases. Roman Math asks for nothing beyond the download.

Roman Math ships an update every 5 days, Merge Knife every 2 months. The most recent releases landed on October 27, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Roman Math | Merge Knife |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/merge-knife/id1624414244/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 77 MB | 130 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pavolle Bilisim Ticaret Limited Sirketi](https://appshunter.io/developer/1538598076) | [Shanghai Pulu Network Technology Co., Ltd.](https://appshunter.io/developer/1469533027) |

## What reviewers say

### Roman Math

[App page](https://appshunter.io/ios/app/roman-math/id1586797205)

**Features:** macOS Compatibility

**In-app purchases:** none


### Merge Knife

[App page](https://appshunter.io/ios/app/merge-knife/id1624414244)

Merge identical knives to unlock new varieties and earn coins. Build your own store, level up your blacksmith shop, and expand your forging capabilities to become an idle master. Collect over 50 unique knives in this synthesis and idle gameplay experience.

**Highlights:** Merge identical knives, Unlock over 50 knife varieties, Build and upgrade your store, Earn coins and experience, Expand forging places, Idle gameplay

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| 40 rubies | $0.99 | one-time |
| 440 rubies | $9.99 | one-time |
| 920 rubies | $19.99 | one-time |
| 1440 rubies | $29.99 | one-time |
| 2800 rubies | $49.99 | one-time |


## Frequently asked questions

### Is Roman Math free?

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

### Is Merge Knife free?

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

### Do Roman Math or Merge Knife have ads?

Merge Knife shows ads; Roman Math does not.

### Which is updated more often, Roman Math or Merge Knife?

Roman Math ships an update every 5 days, and Merge Knife every 2 months. Most recently, Roman Math was updated on October 27, 2026 and Merge Knife on October 8, 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.*