# Dual N vs Razer Cortex Mobile

The clearest difference is in-app purchases: Razer Cortex Mobile at none against Dual N's 2. Dual N's advantage is review sentiment (55% vs 35%) and update cadence (every 3 weeks vs every 2 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Dual N sells 2 in-app purchases, starting at $0.99 per month. Razer Cortex Mobile asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Dual N against 4.6 for Razer Cortex Mobile. Both are backed by a comparable volume of ratings — 1.2K and 3.5K respectively. Written reviews are what separate them: 55% of Dual N's written reviews are positive against 35% of Razer Cortex Mobile's.

Dual N ships an update every 3 weeks, Razer Cortex Mobile every 2 months. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Dual N | Razer Cortex Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.2K ratings)](https://appshunter.io/ios/app/dual-n-back/id1375327852/reviews)** | [4.6 (3.5K ratings)](https://appshunter.io/ios/app/razer-cortex-mobile/id1565916457/reviews) |
| Number of ratings | 1.2K | **3.5K** |
| Positive reviews | **55.3% of reviews** | 35.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 33 MB | 164 MB |
| Requires iOS | **13.0** | 17 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jens Grud](https://appshunter.io/developer/1146280423) | [Razer](https://appshunter.io/developer/860552677) |

## What reviewers say

### Dual N

[App page](https://appshunter.io/ios/app/dual-n-back/id1375327852)

This app offers a scientifically proven memory workout by challenging users to remember both the position of a square and a spoken letter. The difficulty increases as users improve, requiring them to recall information from a specified number of turns ago.

**Highlights:** Memory and position recall, Progress tracking, Adjustable game duration, Automatic level adjustment, Dark Mode support, Export gameplay data

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dual N-Back pro | $0.99 | per month |
| Dual N-back pro | $7.99 | per year |

**What reviewers like**

- 🚀 Effective memory training
- 👍 Simple and intuitive interface
- 🔒 No ads
- 💡 Customizable settings
- 👍 Solid dual n-back app

**What reviewers complain about**

- 🐛 Buggy behavior (unregistered clicks, sound issues)
- 💰 Subscription model for higher levels
- 🔍 Lack of clear instructions
- 🔍 Difficult for beginners
- 🔍 Uneven interval lengths

**Reported bugs**

- Sudden change in sound/language
- Accidental stop button presses
- Inconsistent level adjustments
- Scoring issues (e.g., combining square and sound scores)
- Compatibility problems on certain devices

**Requested features**

- Add N=1 level for beginners
- Improve statistics and progress tracking
- Allow changing sounds/visuals
- Extend game duration beyond 60 seconds
- Provide more detailed instructions


### Razer Cortex Mobile

[App page](https://appshunter.io/ios/app/razer-cortex-mobile/id1565916457)

Enhance your mobile gaming with a console-like experience. Discover curated games, play your installed titles, customize your controller, and stream your gameplay. This app is the perfect companion for compatible Razer Kishi controllers.

**Highlights:** Curated game catalog, Play installed games, Controller customization, Record and stream gameplay, Xbox Cloud Gaming integration, Controller firmware updates

**Features:** Game Controller support

**In-app purchases:** none

**What reviewers like**

- 👍 Good quality and controls
- 🚀 Improved app features and polish
- 🚀 Ability to add games to launcher
- 👍 No subscription required for features

**What reviewers complain about**

- 🐛 Unable to add games or emulators to the app
- 🐛 Compatibility issues with newer devices (iPhone 15)
- 🐛 Crashes and bugs with the app
- 🐛 Lack of support for virtual controller on iOS
- 🐛 Inability to remap all buttons

**Reported bugs**

- App crashes on launch
- Unable to detect or update controller firmware
- Incompatibility with newer iOS versions and devices
- Inability to add games or emulators to the app

**Requested features**

- Add more games and game genres
- Integrate with cloud gaming and streaming services
- Improve game library management and organization
- Add support for virtual controller on iOS
- Improve button remapping and customization options


## Frequently asked questions

### Is Dual N free?

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

### Is Razer Cortex Mobile free?

Razer Cortex Mobile is free to download, with no in-app purchases.

### Which has better reviews, Dual N or Razer Cortex Mobile?

Dual N is rated higher. Dual N averages 4.7 out of 5 from 1.2K ratings, while Razer Cortex Mobile averages 4.6 from 3.5K ratings.

### Do Dual N or Razer Cortex Mobile have ads?

Neither Dual N nor Razer Cortex Mobile shows ads.

### Which is updated more often, Dual N or Razer Cortex Mobile?

Dual N ships an update every 3 weeks, and Razer Cortex Mobile every 2 months. Most recently, Dual N was updated on October 26, 2026 and Razer Cortex Mobile on October 27, 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.*