NBack 3D vs 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 :
N
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I wanted to play "Oni Keisan" on my iPhone! That's why I created this N-Back brain training app. What is this training? Solve calculations while remembering the answers from a few questions back. Juggling "memorizing" and "calculating" at the same time gives your brain a real workout. Features ◆ Two Input Modes - Tap Mode: Quickly tap the answer - Handwriting Mode: Write numbers directly ◆ Build Daily Habits - Set daily play goals - Track your streak - Record how you're feeling today ◆ Track Your Progress - Accuracy trends - Level-up history - Play history ◆ Customize Your Way - Adjust question count & time limits - 3 color themes - iPhone & iPad support Perfect For - Those who want to play Oni Keisan without a dedicated game console - Anyone looking for a quick mental exercise - People who want to build a daily habit Just 5 minutes a day. A casual brain training experience.
Screenshots
Verdict
The clearest difference is update cadence: N at every 4 days against NBack 3D's every 10 months. NBack 3D's advantage is iOS requirement (15.6 vs 26.0). On price, ads, in-app purchases 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 and N sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
NBack 3D ships an update every 10 months, N every 4 days. The most recent releases landed on September 11, 2026 and September 7, 2026 respectively.
| Parameter | NBack 3D | N |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 months | Every 4 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 5 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasuyoshi Ota | chunson yamada |
In-app purchases
NBack 3D
- Extend to 20'Back & Remove Ads$2.99
N
- １ヶ月プラン$0.991 Month
