Comparison

Dual N vs SFDC認定アプリケーションビルダー資格試験対策

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Dual N

This scientifically proven brain training app enhances working memory, concentration, and cognitive abilities. It helps improve IQ, memory, and thinking speed through engaging gameplay that challenges your brain. Consistent practice leads to noticeable improvements in focus and mental agility.

Highlights
  • Strengthens working memory
  • Improves concentration
  • Enhances cognitive abilities
  • Difficulty adjustment (N-2 to N-5)
  • Progress visualization with graphs
  • Statistics and calendar tracking
  • Global player rankings
Read full description

■ What is Dual N-Back Dual N-Back is a scientifically proven brain training app that strengthens your working memory, concentration, and cognitive abilities. With consistent training, it helps improve your IQ, memory, and thinking speed. --- ■ Basic Rules The rules of Dual N-Back are simple, yet your brain works harder the more you play. * Remember the sequence of positions and letters displayed on the screen. * When the current position or letter matches the one shown N steps earlier, press the corresponding button. * Each correct answer sharpens your memory and focus — like a workout for your brain. * The challenge continues until all lives are lost, testing your concentration and endurance. --- ■ Main Features * Difficulty Adjustment: Choose from N-2 to N-5 and train at your own level. * Progress Visualization: Track your training volume with graphs and see your improvement through the average correct answers per game. * Statistics and Calendar: View summarized stats such as play count, accuracy rate, and average score. Review your progress on a calendar to stay motivated. * Global Ranking: Compete with players around the world and challenge the limits of your brain. --- ■ The More You Play, the Stronger Your Brain Becomes Just a few minutes a day — on your commute or during a break — can make a real difference. Every session helps your brain grow stronger, step by step. Take one step today to evolve your mind.

About

SFDC認定アプリケーションビルダー資格試験対策

Features
Read full description

Salesforce認定Platform App Builderの資格試験対策アプリです。実践的な問題で効率的に学習し、合格を目指しましょう。 ■ 主な機能 ・豊富な練習問題で実力アップ ・セクション別学習で苦手分野を克服 ・成績分析で学習進捗を可視化 ・間違えた問題の復習機能 ・スマホでいつでもどこでも学習可能 ■ 対象資格 Salesforce認定Platform App Builder ■ 学習のポイント ・データモデリングとデータ管理 ・セキュリティ ・ビジネスロジックとプロセスの自動化 ・ユーザーインターフェース ・レポートとダッシュボード ・アプリケーションのデプロイ 利用規約(EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Dual N4 screens
SFDC認定アプリケーションビルダー資格試験対策4 screens

Verdict

The call

The clearest difference is update cadence: Dual N at every 10 days against SFDC認定アプリケーションビルダー資格試験対策's every 3 weeks. SFDC認定アプリケーションビルダー資格試験対策's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Dual N sells 2 in-app purchases, starting at $1.99 per month and SFDC認定アプリケーションビルダー資格試験対策 sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Dual N ships an update every 10 days, SFDC認定アプリケーションビルダー資格試験対策 every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Dual N versus SFDC認定アプリケーションビルダー資格試験対策: the parameters behind the verdict, then further details
ParameterDual NSFDC認定アプリケーションビルダー資格試験対策
PriceFreeFree
Rating4.3 (19 ratings) — better—
Positive reviews48.0% of reviews—
Number of ratings19 — better—
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.015.1 — better
Further details — not scored
Size41 MB39 MB
Age rating4+4+
DeveloperHiromi FujitaRUOK LLC

In-app purchases

2 purchases

Dual N

Subscriptions2
  • Monthly Premium Features$1.991 Month
  • Annual Premium Features$19.991 Year
2 purchases

SFDC認定アプリケーションビルダー資格試験対策

Subscriptions1
  • ウィークリープレミアムアクセス$2.997 Days
One-time1
  • 全問解放$22.99

Questions

Is Dual N free?
Dual N is free to download, with in-app purchases available.
Is SFDC認定アプリケーションビルダー資格試験対策 free?
SFDC認定アプリケーションビルダー資格試験対策 is free to download, with in-app purchases available.
Do Dual N or SFDC認定アプリケーションビルダー資格試験対策 have ads?
Neither Dual N nor SFDC認定アプリケーションビルダー資格試験対策 shows ads.
Which is updated more often, Dual N or SFDC認定アプリケーションビルダー資格試験対策?
Dual N ships an update every 10 days, and SFDC認定アプリケーションビルダー資格試験対策 every 3 weeks. Most recently, Dual N was updated on November 3, 2026 and SFDC認定アプリケーションビルダー資格試験対策 on October 31, 2026.

Other comparisons