# Subtraction Math Master 2 vs Numeric Odyssey

The clearest difference is in-app purchases: Numeric Odyssey at none against Subtraction Math Master 2's 1. Numeric Odyssey also leads on update cadence (every 2 weeks vs every 34 months). Subtraction Math Master 2's advantage is ads (none vs shown) and iOS requirement (8.0 vs 15.1). On price and device support there is nothing between them.

Both are free to download. Subtraction Math Master 2 sells 1 one-off in-app purchase. Numeric Odyssey asks for nothing beyond the download.

Subtraction Math Master 2 ships an update every 34 months, Numeric Odyssey every 2 weeks. The most recent releases landed on September 21, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Subtraction Math Master 2 | Numeric Odyssey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (2 ratings)](https://appshunter.io/ios/app/subtraction-math-master-2/id806133567/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 34 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 27 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Peter Li](https://appshunter.io/developer/424298074) | [Truong Van Truong](https://appshunter.io/developer/1601624508) |

## What reviewers say

### Subtraction Math Master 2

[App page](https://appshunter.io/ios/app/subtraction-math-master-2/id806133567)

This game challenges players to improve their subtraction speed and mental math skills. It features a "LEVEL UP" system that increases difficulty with correct answers and includes leaderboards and achievements for competitive play.

**Highlights:** 2-minute subtraction games, LEVEL UP difficulty system, Leaderboards and achievements, Intuitive user interface, Share results globally

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| REMOVE ADS (Subtraction 2) | $0.99 | one-time |


### Numeric Odyssey

[App page](https://appshunter.io/ios/app/numeric-odyssey/id6472152796)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Subtraction Math Master 2 free?

Subtraction Math Master 2 is free to download, with in-app purchases available.

### Is Numeric Odyssey free?

Numeric Odyssey is free to download, with no in-app purchases.

### Do Subtraction Math Master 2 or Numeric Odyssey have ads?

Numeric Odyssey shows ads; Subtraction Math Master 2 does not.

### Which is updated more often, Subtraction Math Master 2 or Numeric Odyssey?

Subtraction Math Master 2 ships an update every 34 months, and Numeric Odyssey every 2 weeks. Most recently, Subtraction Math Master 2 was updated on September 21, 2026 and Numeric Odyssey on September 17, 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.*