# Subtraction Math Master vs Flick Letters Brain Training

The clearest difference is in-app purchases: Flick Letters Brain Training at none against Subtraction Math Master's 1. Flick Letters Brain Training also leads on update cadence (every 3 days vs every 18 months). Subtraction Math Master's advantage is ads (none vs shown) and iOS requirement (8.0 vs 14.0). 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. Flick Letters Brain Training asks for nothing beyond the download.

Subtraction Math Master ships an update every 18 months, Flick Letters Brain Training every 3 days. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Subtraction Math Master | Flick Letters Brain Training |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 18 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 117 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Peter Li](https://appshunter.io/developer/424298074) | [TSUBASA MIZUNO](https://appshunter.io/developer/888522562) |

## 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 |


### Flick Letters Brain Training

[App page](https://appshunter.io/ios/app/flick-letters-brain-training/id6757726732)

**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 Flick Letters Brain Training free?

Flick Letters Brain Training is free to download, with no in-app purchases.

### Do Subtraction Math Master or Flick Letters Brain Training have ads?

Flick Letters Brain Training shows ads; Subtraction Math Master does not.

### Which is updated more often, Subtraction Math Master or Flick Letters Brain Training?

Subtraction Math Master ships an update every 18 months, and Flick Letters Brain Training every 3 days. Most recently, Subtraction Math Master was updated on September 18, 2026 and Flick Letters Brain Training on September 9, 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.*