Comparison

Dual N vs Verbal Fluency

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

Head to head
About

Dual N

This app is a brain game designed to improve working memory and cognitive skills through a challenging memory-training exercise. It offers customizable difficulty, goal setting, and global leaderboards to track progress. An ad-free experience is available via a subscription.

Highlights
  • Working memory training
  • Customizable difficulty (N-value, interval, session length)
  • Goal setting and reminders
  • Global leaderboards
  • Multilingual support
  • Ad-free Pro version
Features
Read full description

Dual NBack – Brain Training to Improve Memory Dual NBack is a fun and challenging brain game designed to strengthen your working memory. Set goals, get reminders, and climb the global leaderboards as you sharpen your mind! What Is Dual NBack? Dual NBack is a memory-training game that presents audio (letters) and visual (positions) sequences simultaneously. Research suggests that consistent play may enhance your working memory—the ability to hold and process information briefly—and also boost short-term recall. How to Play The game starts at Level N=2, where you need to remember the position (square) and the sound (letter) from two turns back. If the current position or sound matches what was shown two turns ago, tap the corresponding button. Strong performance automatically raises your level, but you can manually adjust the difficulty whenever you like. Key Features Customizable Settings Tailor your training: tweak the N-value (number of turns to recall), the interval between sounds/blocks, and session length as you see fit. Reminders & Goals Set daily or weekly targets and enable notifications to help you practice consistently. Global Leaderboards Compare your scores with players worldwide and see how you rank as you improve. Share Function Post your results on social media or messaging apps to challenge your friends and family. Multilingual Support Currently offered in English and Japanese, with more languages on the way. Why Train Your Working Memory? Working memory stores information for a few seconds to minutes, enabling you to make decisions, perform calculations, or tackle other cognitive tasks. Playing Dual NBack regularly can help strengthen this mental capacity, potentially improving focus, concentration, and overall brain agility. Ad-Free Experience with Dual NBack Pro Enjoy a 3-day free trial of Dual NBack Pro to train with no ads or interruptions. If you choose to purchase Dual NBack Pro, the payment is charged to your iTunes account. Renewal fees are charged within 24 hours before the current subscription period ends. You can cancel your subscription anytime: Go to Settings → tap your name → Subscriptions → locate and cancel the subscription you want to end. If you don’t cancel before the trial ends, the paid subscription automatically starts. Privacy Policy: https://goukakuappli.co.jp/privacy End User License Agreement (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Summary Strengthen Your Mind: Give your working memory a proven workout. Adapt the Difficulty: Start at N=2 or set your preferred challenge level. Stay Motivated: Leverage reminders, goals, and leaderboards to keep pushing your limits. Go Pro for No Ads: Take advantage of a 3-day free trial and upgrade to an ad-free training experience. Download Dual NBack now and take your cognitive performance to a new level!

About

Verbal Fluency

This is a fast-paced word game that tests your vocabulary, spelling, memory, and mental speed. Choose a letter, set a timer, and type as many words as possible before time runs out. It's perfect for brain training and language practice.

Highlights
  • Fast-paced word challenges
  • Vocabulary and spelling improvement
  • Multiple language support
  • Timed rounds for mental speed
  • Offline play
  • Score sharing and friend challenges
Currently charting
Read full description

Verbal Fluency – Vocabulary & Word Game How many words can you think of before time runs out? Verbal Fluency is a fast-paced word game that challenges your vocabulary, spelling, memory and mental speed. Choose a letter, set the timer, and type as many real words as possible before the clock hits zero. Simple to learn, difficult to master! Perfect for brain training, vocabulary building, language practice and quick daily mental workouts. ----- PLAY IN MULTIPLE LANGUAGES Challenge yourself in your native language or test your knowledge in another. Verbal Fluency supports multiple languages including: English, Français, Italiano, Deutsch, Nederlands, Dansk, Español, Norsk Bokmål, Norsk Nynorsk, Polski, Português, Română, Suomi, Svenska and Čeština. Great for: • Language learners • ESL students • Bilingual players • Classroom vocabulary practice • Expanding word recall in different languages Switch languages anytime and train your brain in new ways. ----- TRAIN YOUR BRAIN • Improve vocabulary and spelling • Strengthen memory and cognitive speed • Develop faster word recall • Improve typing accuracy • Challenge yourself with timed rounds Whether you love word puzzles, brain games or educational challenges, Verbal Fluency gives your mind a fast and fun workout. ----- HOW IT WORKS 1. Swipe across the alphabet to choose your letter (or tap Random) 2. Select your time limit – 30 seconds, 90 seconds or 3 minutes 3. Choose your word length – 4, 5 or 6 letters 4. Type as many valid words as possible before time runs out Each word is instantly verified: • Green = correct • Red = not valid • Yellow = already used When the timer ends, review your score and try again to beat your best. Some letters are easy. Others are challenging. Can you master them all? ----- WHY YOU’LL LOVE IT • Fast, fun and challenging gameplay • Works offline – no WiFi required • Share your score and challenge friends • Available on iPhone, iPad, Mac and Vision Pro • Supports multiple languages Play anywhere. Practice anytime. Think faster. Download Verbal Fluency today and start your daily brain workout.

Screenshots

Dual N4 screens
Verbal Fluency4 screens

Verdict

The call

The clearest difference is review sentiment: Dual N at 51% against Verbal Fluency's 0%. Dual N also leads on price (Free vs $0.29) and rating (4.6 vs 3.8). Verbal Fluency's advantage is in-app purchases (none vs 2) and chart position (#35 vs unranked). On ads and iOS requirement 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

Dual N is free to download; Verbal Fluency costs $0.29 up front. Dual N sells 2 in-app purchases, starting at $0.99 per month. Verbal Fluency asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Dual N holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: Dual N has 376 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 51% of Dual N's written reviews are positive against 0% of Verbal Fluency's.

UpkeepUpdate frequency

Dual N ships an update fortnightly, Verbal Fluency every 5 months. Both last shipped on October 27, 2026.

Scorecard9 real differences · 2 level
Dual N versus Verbal Fluency: the parameters behind the verdict, then further details
ParameterDual NVerbal Fluency
PriceFree — better$0.29
Rating4.6 (376 ratings) — better3.8 (5 ratings)
Positive reviews50.9% of reviews — better0.0% of reviews
Number of ratings376 — better5
Update frequencyFortnightly — betterEvery 5 months
AdsYesYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
Best chart rank—#35 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac, Vision Pro — better
Requires iOS15.015.0
Further details — not scored
Size199 MB11 MB
Age rating4+4+
DeveloperGOKAKU SUPPLI, LIMITED LIABILITY CO.Thomas Coomer

Customer experience

Dual N

All ratings362 ratings
Positive88.1%
Neutral5.8%
Negative6.1%
Written reviews110 reviews
Positive50.9%
Neutral20.0%
Negative29.1%

Verbal Fluency

All ratings5 ratings
Positive60.0%
Neutral20.0%
Negative20.0%
Written reviews3 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

In-app purchases

2 purchases

Dual N

Subscriptions1
  • NBack Monthly Subscription3 Days trial$0.991 Month
One-time1
  • Lifetime Pass$12.99
None

Verbal Fluency

No in-app purchases

Questions

Is Dual N free?
Dual N is free to download, with in-app purchases available.
Is Verbal Fluency free?
Verbal Fluency costs $0.29, with no in-app purchases.
Which has better reviews, Dual N or Verbal Fluency?
Dual N is rated higher. Dual N averages 4.6 out of 5 from 376 ratings, while Verbal Fluency averages 3.8 from 5 ratings.
Do Dual N or Verbal Fluency have ads?
Both Dual N and Verbal Fluency show ads.
Which is updated more often, Dual N or Verbal Fluency?
Dual N ships an update fortnightly, and Verbal Fluency every 5 months. Most recently, Dual N was updated on October 27, 2026 and Verbal Fluency on October 27, 2026.

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