N vs サステナ経営検定3級
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
サステナ経営検定3級
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サステナビリティ経営検定3級の対策アプリです。 ■ 5章×100問の本格問題集 第1章 サステナビリティ基礎概念 第2章 環境問題と気候変動 第3章 SDGs・ESG基礎 第4章 サステナ経営の基本 第5章 環境法規・社会動向 ■ 主な機能 ・章別練習で苦手分野を集中対策 ・全問詳しい解説付き ・進捗管理と統計表示 ・ダーク・ライトテーマ対応 ・完全オフライン動作 本アプリはサステナビリティ経営協会主催「サステナビリティ経営検定」3級の予想問題集です。初級レベル。
Screenshots
Verdict
The clearest difference is price: N at Free against サステナ経営検定3級's $4.99. N also leads on update cadence (every 4 days vs monthly). サステナ経営検定3級's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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
N is free to download; サステナ経営検定3級 costs $4.99 up front. N sells 1 in-app purchase, starting at $0.99 per month. サステナ経営検定3級 asks for nothing beyond the download.
N ships an update every 4 days, サステナ経営検定3級 monthly. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.
| Parameter | N | サステナ経営検定3級 |
|---|---|---|
| Price | Free — better | $4.99 |
| Update frequency | Every 4 days — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 21 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | chunson yamada | satoshi yoshida |
In-app purchases
N
- １ヶ月プラン$0.991 Month
サステナ経営検定3級
No in-app purchases
