# Subtraction Math Master vs Luck Sword

The clearest difference is in-app purchases: Luck Sword at none against Subtraction Math Master's 1. Luck Sword also leads on update cadence (every 4 days vs every 18 months). Subtraction Math Master's advantage is ads (none vs shown) and iOS requirement (8.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Subtraction Math Master sells 1 one-off in-app purchase. Luck Sword asks for nothing beyond the download.

Subtraction Math Master ships an update every 18 months, Luck Sword every 4 days. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Subtraction Math Master | Luck Sword |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 18 months | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 240 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Peter Li](https://appshunter.io/developer/424298074) | [Bongwook Bin](https://appshunter.io/developer/1068338045) |

## What reviewers say

### Subtraction Math Master

[App page](https://appshunter.io/ios/app/subtraction-math-master/id672670414)

Enhance your mental math skills with this game focused on 2-digit subtraction. It offers modes for quick challenges and unlimited practice, helping you reduce calculator reliance and boost cognitive function.

**Highlights:** Improve 2-digit mental subtraction, Timed challenges and unlimited practice modes, Track scores and statistics, Game Center Leaderboards & Achievements, Share scores with friends and family, Stylish and intuitive interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WORK MODE | $0.99 | one-time |


### Luck Sword

[App page](https://appshunter.io/ios/app/luck-sword/id6789642800)

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

**In-app purchases:** none


## Frequently asked questions

### Is Subtraction Math Master free?

Subtraction Math Master is free to download, with in-app purchases available.

### Is Luck Sword free?

Luck Sword is free to download, with no in-app purchases.

### Do Subtraction Math Master or Luck Sword have ads?

Luck Sword shows ads; Subtraction Math Master does not.

### Which is updated more often, Subtraction Math Master or Luck Sword?

Subtraction Math Master ships an update every 18 months, and Luck Sword every 4 days. Most recently, Subtraction Math Master was updated on September 29, 2026 and Luck Sword on October 7, 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.*