Dual N vs Razer Cortex Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dual N
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.
- Memory and position recall
- Progress tracking
- Adjustable game duration
- Automatic level adjustment
- Dark Mode support
- Export gameplay data
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Dual N-back. Scientifically proven memory workout! - Every session consists of 40 turns. Each turn a square will light up in a 3x3 grid and a letter will be read out loud. - Your job is to remember both the letter and the position of the square - and then indicate when the current square or letter is the same as it was N turns ago. - As you get better, the number of turns N you have to remember is increased. *** Features *** - Track your progress - Toggle automatic level adjustment - Dark Mode support on iOS 13 - Change game duration and delay between readings - Landscape game play support - Change sounds - Inverse buttons - Exporting your gameplay data - Link your account with email *** Terms of Use *** - https://jensgrud.wixsite.com/nback/terms
Razer Cortex Mobile
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.
- Curated game catalog
- Play installed games
- Controller customization
- Record and stream gameplay
- Xbox Cloud Gaming integration
- Controller firmware updates
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Razer Nexus is now renamed to Razer Cortex Mobile. Razer Cortex Mobile is compatible with the Razer Prio, Razer Kishi V3 series, Razer Kishi Ultra, and Razer Kishi V2 series. 【GAME CLIPS】 Play on PC with Razer Cortex to clip your greatest gaming moments into highlights. Game Clips on mobile quickly syncs those highlights to your phone so you can browse your full library and replay your best plays anytime, anywhere. Share your favorite clips to social platforms with just one tap. · PC gameplay highlights quickly synced to your phone—view them anytime, anywhere. · Browse and replay your full clip library anywhere. · Share to social platforms with one tap. 【DISCOVER THOUSANDS OF COMPATIBLE GAMES】 · Discover handpicked game recommendations across curated categories—find your next favorite game in seconds. · Optional video trailers make it easier to tell at a glance if a game looks fun, watch before you download. · Fully compatible with any game or service that supports controllers—just plug and play. 【CUSTOMIZE YOUR CONTROLLER】 · Remap buttons and triggers. · Adjust thumbstick dead zones and sensitivity. · Specify custom Chroma colors and animation patterns. · Update controller firmware for new features and improvements. 【XBOX CLOUD GAMING】 · Browse the complete catalog of Xbox Cloud games from within Cortex Mobile. · Includes information on how to play these games directly on your iPhone. · Xbox Game Pass Ultimate account required for most games. 【MORE FEATURES】 · Record and livestream your gameplay. · Customizable UI with Dynamic Color and Game Background modes.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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. Both last shipped on October 21, 2026.
| Parameter | Dual N | Razer Cortex Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (1.2K ratings) — better | 4.6 (3.5K ratings) |
| Positive reviews | 55.3% of reviews — better | 35.1% of reviews |
| Number of ratings | 1.2K | 3.5K — better |
| Update frequency | Every 3 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.0 — better | 17 |
| Further details — not scored | ||
| Size | 33 MB | 164 MB |
| Age rating | 4+ | 4+ |
| Developer | Jens Grud | Razer |
Customer experience
Dual N
Razer Cortex Mobile
User reviews
Dual N
From 1.2K App Store ratingsWhat we love
- 🚀 Effective memory training
- 👍 Simple and intuitive interface
- 🔒 No ads
- 💡 Customizable settings
- 👍 Solid dual n-back app
Room to improve
- 🐛 Buggy behavior (unregistered clicks, sound issues)
- 💰 Subscription model for higher levels
- 🔍 Lack of clear instructions
- 🔍 Difficult for beginners
- 🔍 Uneven interval lengths
Razer Cortex Mobile
From 3.5K App Store ratingsWhat we love
- 👍 Good quality and controls
- 🚀 Improved app features and polish
- 🚀 Ability to add games to launcher
- 👍 No subscription required for features
Room to improve
- 🐛 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
Bugs and requests
Dual N
Reported bugs
5 issues- 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
5 requests- 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
Reported bugs
4 issues- 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
5 requests- 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
In-app purchases
Dual N
- Dual N-Back pro$0.991 Month
- Dual N-back pro$7.991 Year
Razer Cortex Mobile
No in-app purchases
