n vs NBack 3D
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
n
Enhance your working memory with this brain training application. It challenges you to recall past information by selecting difficulty levels and memorizing digits from addition problems.
- Working memory training
- Adjustable difficulty levels (1-10)
- Memorization of addition problem digits
- Tap last digit of previous answers
- N-back exercise implementation
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Good brain trainer app for improving your working memory. ＜ USAGE ＞ 1. Select level (1-10). 2. Memorize the answer of easy addition for the level times. 3. Continue memorizing and tap the last digit of the answer of n times before (NOT current answer). If you don't know what is N-Back, please see below. http://en.wikipedia.org/wiki/N-back
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 :
Screenshots
Verdict
The clearest difference is review sentiment: NBack 3D at 100% against n's 39%. NBack 3D also leads on rating (5.0 vs 3.0). n's advantage is in-app purchases (none vs 1) and ratings volume (44 vs 1). On price, update cadence, ads and device support 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. n asks for nothing beyond the download.
NBack 3D holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: n has 44 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 39% of n's written reviews are positive against 100% of NBack 3D's.
n ships an update every 12 months, NBack 3D every 10 months. The most recent releases landed on September 13, 2026 and September 11, 2026 respectively.
| Parameter | n | NBack 3D |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (44 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 38.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 44 — better | 1 |
| Update frequency | Every 12 months | Every 10 months — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 5 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | dicwizard.jp | Yasuyoshi Ota |
Customer experience
n
NBack 3D
In-app purchases
n
No in-app purchases
NBack 3D
- Extend to 20'Back & Remove Ads$2.99
