Comparison

Dual vs N

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Dual

This cognitive training game is designed to enhance working memory through a simple yet challenging experience. It offers a clean interface with detailed history tracking and customizable gameplay and aesthetics. All data is stored locally for enhanced privacy.

Highlights
  • Working memory improvement
  • Detailed game history
  • Replay previous rounds
  • Gameplay customization
  • Aesthetic customization
  • Local data storage
Features
Read full description

Welcome to Dual-N-Back, a cognitive game scientifically proven to improve working memory. The game is fairly simple to learn, but it can get quite challenging as you get to higher levels. The philosophy of this app is to provide a clean and minimalistic interface for the game Dual-N-Back, whilst providing additional functionality to help users improve as fast as possible and understand their tendencies. Some Features Include: - Game history, with full information on your Correct answers, Misses and False Alarms. - Trial history, for the games that you have recently played. You will be able to view the squares that showed up, as well as which letters were said. You can also view which buttons you pressed to see where you went wrong. - Replay round, allowing you to play a round you previously played, with the same squares on the grid, with the same letters which were said. - Gameplay customisations, such as quadratic or linear trial numbers, trial duration, automatic N-level adjustments. - Aesthetic customisations, such as light or dark mode, and accent colours. - Note: this application does not make any connections to external servers, and all your information will be kept locally for privacy sake. It will not make any notifications and has zero advertisements and subscription based services.

About

N

Features
Read full description

A daily training app based on the N-Back task, widely used in cognitive psychology research. Challenge your working memory with just 5 minutes a day. ◆ 3 TRAINING MODES • Single — Position: Memorize lit positions on a 3×3 grid • Single — Audio: Remember spoken letters via text-to-speech • Dual — Position + Audio: Train both at the same time for the ultimate challenge ◆ TRACK YOUR GROWTH • Accuracy trend chart and session history • Highest N-level reached • Streak counter to build a daily habit • iCloud sync keeps your training data on every device ◆ COMPETE & ACHIEVE • Game Center leaderboards: accuracy, max N-level, streak • 8 achievements from your first session to 30-day streaks ◆ DESIGNED FOR FOCUS • Zero ads during training — your concentration comes first • Clean, minimal interface inspired by fitness tracking tools ◆ SIMPLE PRICING • Free to use with occasional ads (never during training) • Optional Premium subscription removes all ads. Every training feature stays free ◆ ADJUSTABLE DIFFICULTY • N-1 to N-9: start easy and progress at your own pace • Suitable for students, professionals, and anyone looking to challenge their cognitive abilities Note: This app is a cognitive training tool based on the N-Back task used in research. It is not a medical device and does not diagnose, treat, or prevent any condition. Improvement in cognitive function is not guaranteed. Premium is an auto-renewing monthly subscription. Payment is charged to your Apple Account, and the subscription renews automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel it anytime in your Apple Account settings. Terms of Use: https://fukuidinotech.github.io/nback-training-site/en/terms.html Privacy Policy: https://fukuidinotech.github.io/nback-training-site/en/privacy.html Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Dual4 screens
N4 screens

Verdict

The call

The clearest difference is price: N at Free against Dual's $0.99. Dual's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

N is free to download; Dual costs $0.99 up front. N sells 1 in-app purchase, starting at $1.99 per month. Dual asks for nothing beyond the download.

UpkeepUpdate frequency

Dual ships an update every 2 days, N every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Dual versus N: the parameters behind the verdict, then further details
ParameterDualN
Price$0.99Free — better
Rating4.8 (4 ratings) — better—
Positive reviews90.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 days — betterEvery 3 days
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.6 — better17.0
Further details — not scored
Size1 MB5 MB
Age rating4+4+
DeveloperAndrew TangToru Fukui

In-app purchases

None

Dual

No in-app purchases

1 purchases

N

Subscriptions1
  • Premium (Monthly)$1.991 Month

Questions

Is Dual free?
Dual costs $0.99, with no in-app purchases.
Is N free?
N is free to download, with in-app purchases available.
Do Dual or N have ads?
N shows ads; Dual does not.
Which is updated more often, Dual or N?
Dual ships an update every 2 days, and N every 3 days. Most recently, Dual was updated on October 24, 2026 and N on October 25, 2026.

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