# Dual N vs Four Operations Math

The clearest difference is review sentiment: Four Operations Math at 100% against Dual N's 48%. Four Operations Math also leads on rating (5.0 vs 4.3) and in-app purchases (none vs 2). Dual N's advantage is ratings volume (19 vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Dual N sells 2 in-app purchases, starting at $1.99 per month. Four Operations Math asks for nothing beyond the download.

Four Operations Math holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Dual N has 19 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 48% of Dual N's written reviews are positive against 100% of Four Operations Math's.

Dual N ships an update every 10 days, Four Operations Math every 8 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Dual N | Four Operations Math |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (19 ratings)](https://appshunter.io/ios/app/dual-n-back-adhd-focus-game/id1568448504/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/four-operations-math/id6529530666/reviews)** |
| Number of ratings | **19** | 1 |
| Positive reviews | 48.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 8 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 21 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hiromi Fujita](https://appshunter.io/developer/1364801021) | [Romiick LLC](https://appshunter.io/developer/1716146475) |

## What reviewers say

### Dual N

[App page](https://appshunter.io/ios/app/dual-n-back-adhd-focus-game/id1568448504)

This scientifically proven brain training app enhances working memory, concentration, and cognitive abilities. It helps improve IQ, memory, and thinking speed through engaging gameplay that challenges your brain. Consistent practice leads to noticeable improvements in focus and mental agility.

**Highlights:** Strengthens working memory, Improves concentration, Enhances cognitive abilities, Difficulty adjustment (N-2 to N-5), Progress visualization with graphs, Statistics and calendar tracking, Global player rankings

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Features | $1.99 | per month |
| Annual Premium Features | $19.99 | per year |


### Four Operations Math

[App page](https://appshunter.io/ios/app/four-operations-math/id6529530666)

This puzzle game challenges players to create mathematical equations using four numbers and basic arithmetic operations to reach a target value. It promotes logical thinking and problem-solving skills through engaging gameplay with varying challenges.

**Highlights:** Create mathematical equations, Use four numbers and operations, Achieve target values, Logical thinking development, Basic and Custom game modes, Intuitive tap and drag controls

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

**In-app purchases:** none


## Frequently asked questions

### Is Dual N free?

Dual N is free to download, with in-app purchases available.

### Is Four Operations Math free?

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

### Which has better reviews, Dual N or Four Operations Math?

Four Operations Math is rated higher. Dual N averages 4.3 out of 5 from 19 ratings, while Four Operations Math averages 5.0 from 1 ratings.

### Do Dual N or Four Operations Math have ads?

Neither Dual N nor Four Operations Math shows ads.

### Which is updated more often, Dual N or Four Operations Math?

Dual N ships an update every 10 days, and Four Operations Math every 8 days. Most recently, Dual N was updated on November 3, 2026 and Four Operations Math on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*