n vs N
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
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 in-app purchases: n at none against N's 1. n also leads on iOS requirement (13.0 vs 26.0). N's advantage is update cadence (every 4 days vs every 12 months). On price, 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. N sells 1 in-app purchase, starting at $0.99 per month. n asks for nothing beyond the download.
n ships an update every 12 months, N every 4 days. The most recent releases landed on September 13, 2026 and September 22, 2026 respectively.
| Parameter | n | N |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (44 ratings) — better | — |
| Positive reviews | 38.9% of reviews | — |
| Number of ratings | 44 — better | — |
| Update frequency | Every 12 months | Every 4 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 5 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | dicwizard.jp | chunson yamada |
In-app purchases
n
No in-app purchases
N
- １ヶ月プラン$0.991 Month
