Dual N vs NBack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dual N
Enhance your working memory and fluid intelligence with a scientifically validated brain training exercise. This app replicates the original Dual N-Back experiment to help you improve your cognitive abilities. Track your progress with detailed statistics and stay motivated with customizable reminders.
- Working memory enhancement
- Fluid intelligence improvement
- Replicates original experiment
- Competitive leaderboards
- Configurable reminders
- Extensive statistics
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Scientific evidence shows this exercise can significantly boost your working memory. Working memory is a memory buffer of your brain, responsible for holding and manipulation of information. Multiple studies suggest that improving brain's working memory increases fluid intelligence. Dual N-Back is the same exact exercise performed by test subjects during experiments. The app mimics the rules and mechanics of original experiments as close as possible giving you at the same time: - Competitive features (Game Center and leaderboards) - Configurable reminders to help you stay on track - Extensive statistics to analyze your progress Also, the app requires no internet connection for the most of its features.
NBack
This scientifically validated cognitive training app is designed to enhance focus, memory, and problem-solving skills. It utilizes the dual n-back method, proven to increase fluid intelligence, offering a challenging yet rewarding experience for those seeking mental improvement.
- Scientifically validated cognitive training
- Dual n-back method for fluid intelligence
- Boosts memory and focus
- Enhances problem-solving skills
- Progress tracking with data-backed gains
- Customizable user experience
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The N-Back Challenge isn’t just a game. It’s a scientifically validated cognitive upgrade — engineered to boost your IQ in just 7 hours total. Built on Research. Designed for Results. Forget brain-training fluff. This is dual n-back — the only method proven to actually increase fluid intelligence, with results published in New York Times, The Wall Street Journal and other top journals. But here’s the truth: It’s brutal. It’s exhausting. It works. If you can complete 20 sessions, you may unlock: • Sharper memory • Faster learning • Enhanced problem-solving • Stronger focus under pressure Track your progress. See real gains — backed by data. All within a beautifully designed, customizable experience. This is not for everyone. But if you’re hungry to evolve, The Challenge awaits. This app is only available in English. Privacy Policy: https://boostiq.app/privacypolicy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: NBack at 100% against Dual N's 52%. NBack also leads on rating (5.0 vs 4.1) and update cadence (every 2 months vs every 6 months). Dual N's advantage is ratings volume (88 vs 1) and iOS requirement (9.0 vs 15.1). On price, ads, in-app purchases and monetization model 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 1 one-off in-app purchase and NBack sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
NBack holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Dual N has 88 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 52% of Dual N's written reviews are positive against 100% of NBack's.
Dual N ships an update every 6 months, NBack every 2 months. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.
| Parameter | Dual N | NBack |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (88 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 52.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 88 — better | 1 |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 42 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Lindware OU | eric cesar |
Customer experience
Dual N
NBack
Bugs and requests
Dual N
Reported bugs
18 issues- Scoring doesn't make sense
- Position and sound buttons come up too late
- Dark background is distracting
- Poorly planned letter combinations
- No sound
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- Audio doesn't work
- Can't distinguish letters
- Low sound quality
- Doesn't advance to next level
- Muffled audio
- Cannot differentiate between B and V
- No immediate feedback
- Levels change too quickly
- Cannot distinguish M and N
- Sound is terrible
- Ads remain after payment
- Stats have issues
- Labels on the side repeat numbers
Requested features
19 requests- Option to turn grid on/off
- Feature to pick scoring method
- Tri-back or Quad-back options
- Option to swap buttons
- Option to reset stats
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- Light theme option
- Session tally or graph
- Sync between devices (Game Center)
- Option for faint white grid
- Immediate feedback on correct/incorrect answers
- Customizable percentages for level changes
- Display exact numbers for right/wrong answers
- Change the voice for letter pronunciation
- Improve audio quality of spoken letters
- Fix audio issues
- Fix sound not working
- Fix muffled audio
- Fix inability to distinguish letters
- Fix position and sound button timing
NBack
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Dual N
- Remove Ads$1.99
NBack
- Monthly membership$1.991 Month
- Yearly membership$14.991 Year
