NBack 3D vs Dual N
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NBack 3D
This app challenges your memory by requiring you to count 3D shapes of specific colors. As the 'N' value increases, the difficulty escalates, testing your ability to recall past stimuli in a sequence.
- N-Back memory challenge
- 3D shape and color recognition
- Increasing difficulty levels
- Sequence memorization
- Cognitive skill enhancement
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The task is only to count the 3D shapes of the specified shape and color, but as the N of the N ‘Back increases, it becomes more difficult. *N’Back : The current answer matches the one from N steps earlier in the sequence. *1’Back 1 task1: count & memorize 2 task2: count & memorize 3 answer for task1 4 task3: count & memorize 5 answer for task2 6 task4: count & memorize : *2’Back 1 task1: count & memorize 2 task2: count & memorize 3 task3: count & memorize 4 answer for task1 5 task4: count & memorize 6 answer for task2 7 task5: count & memorize :
Dual N
This app offers brain-training exercises to enhance working memory, concentration, and problem-solving skills. It features multiple N-back modes, progress tracking, and customizable sessions in a user-friendly interface.
- Dual, Triple & Quad N-Back modes
- Cognitive performance enhancement
- Progress tracking and statistics
- Customizable training sessions
- User-friendly interface
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Dual N-Back, Triple N-Back, or go Quad N-Back for extreme challenge. Elevate your cognitive performance with N Back Extreme – the ultimate brain-training app designed to enhance your working memory. Whether you’re looking to Boost your concentration, Improve your problem-solving skills, or just Challenge your mind, N Back Extreme offers a fun and engaging way to reach your goals. Key Features: Multiple Modes: Choose from dual, triple, or quad n-back challenges that adjust to your skill level and push your memory to new limits. Progress Tracking: Stay motivated by viewing detailed statistics of your progress. Monitor your performance over time and watch your cognitive skills improve. Customisable Sessions: Tailor your training sessions to suit your pace and preferences. User-Friendly Interface: Enjoy a sleek and intuitive design that makes training both effective and fun. Take on the challenge and unlock your brain’s potential with N Back Extreme. Perfect for casual N Backers, students, and anyone interested in mental fitness. Download now and start your journey to a sharper, more focused mind! Experience the extreme in brain training—one session at a time. Terms of use: https://www.arcaneorbit.com/nbackextreme/terms.md Privacy Policy: https://www.arcaneorbit.com/nbackextreme/privacy.md
Screenshots
Verdict
The clearest difference is rating: NBack 3D at 5.0 against Dual N's 4.4. NBack 3D also leads on review sentiment (100% vs 67%) and device support (3 vs 1). Dual N's advantage is ads (none vs shown) and update cadence (every 6 days vs every 10 months). On price, 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. NBack 3D sells 1 one-off in-app purchase and Dual N sells 5 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
NBack 3D holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Dual N has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of NBack 3D's written reviews are positive against 67% of Dual N's.
NBack 3D ships an update every 10 months, Dual N every 6 days. The most recent releases landed on September 11, 2026 and September 9, 2026 respectively.
| Parameter | NBack 3D | Dual N |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.4 (11 ratings) |
| Positive reviews | 100.0% of reviews — better | 66.7% of reviews |
| Number of ratings | 1 | 11 — better |
| Update frequency | Every 10 months | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 5 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasuyoshi Ota | Jatin Thakur |
Customer experience
NBack 3D
Dual N
In-app purchases
NBack 3D
- Extend to 20'Back & Remove Ads$2.99
Dual N
- Monthly2 variants$1.991 Month
- N Back Extreme Monthly Subscription$4.991 Month
- Six Months2 variants$4.996 Months
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- 6 Months$4.996 Months
- N Back Extreme Yearly Subscription$29.991 Year
