Dual N Reviews: Is It Legit?

Customer Experience

Positive experience50.9% of reviews
Neutral20.0% of reviews
Negative experience29.1% of reviews

~ Based on 110 written reviews from the US App Store.

Is Dual N Safe?

Dual N-Back: Brain-Training appears safe based on user ratings. AppsHunter Safety Score for Dual N is 91/100.

This assessment is based on 376 user ratings, with an App Store average of 4.6/5.

Safety Analysis

88.1% of ratings point to a safe experience
5.8% of ratings suggest some concerns
6.1% of ratings point to a risky experience

~ Based on 362 App Store ratings for Dual N.

Is Dual N Legit?

Dual N-Back: Brain-Training appears to be a legitimate app. AppsHunter Legitimacy Score for Dual N is 95/100.

Based on 95 of 100 points across 7 verification signals from App Store and developer data.

Top reviews

Great game; has a bug that I can’t report

I like this game a lot. But it has a bug that incorrectly marks some of my actions as incorrect. I have screen captures of this to share, but the developer’s web site is entirely in Japanese.

Response from developer

Thank you for taking the time to report this, and sorry about both the gameplay issue and the difficulty finding a way to contact us. The screen captures would be extremely helpful for our investigation. Please feel free to send them to eigomonogatari@frecre.com. We really appreciate you catching this and being willing to share the details with us. We’ll take a close look at what’s happening.

New Mode suggestion

This app is really great, but I want a mode where only the sound or the visuals play, a mode called single n back

Response from developer

Thank you for the great review and suggestion! 😊 A Single N-Back mode for sound-only or visual-only training is a really useful idea, especially for focused practice. We’re considering this for a future update, so please stay tuned. Thanks again for sharing this with us!

Challenging, and genuinely helpful tool

Dual N-Back can be done by anyone in their head by repeating sound and visuals from a few moments prior, but this is an app that allows you to train your memory In a similar way, and notifies you to stay consistent, it doesn’t flood you with ads and it’s an admirably simple and effective tool that’s does its job efficiently. The only thing is the tutorial for some can be lacking a bit of explanation and detail, I think it would be a bit better if they clarified that each sound and position is one turn (or N=1), and the number N is the amount of turns ago that you’re required to remember and respond to in the current turn.
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Response from developer

Thank you for the thoughtful and detailed review! 😊 We’re really happy to hear that you find Dual N-Back effective and helpful for consistent memory training. Your explanation about clarifying each sound/position as one turn, and N as the number of turns back to remember, is very useful. We agree this could make the tutorial easier to understand, especially for new users! We’ll keep this in mind as we improve the onboarding. 🤩

Reviewing dual

It is great memory excercise but you should add different levels not just this one

It’s not bad

But the ads are annoys me before I want to grind the game more

With school

The best memory game i have ever played, helped me to get better grades , and helped me with my adhd

Response from developer

Thank you so much for your kind words! 😊 We're really happy to hear that you've enjoyed the training and found it helpful in your studies. Stories like yours mean a lot to our small team and motivate us to keep improving the app. Thanks again for sharing your experience, and we wish you all the best with school! 🧠💪

Very challenging

Seems like it's growing new neural connections. Sure beats candy crush or short form content

Response from developer

Thank you for the review! 😊 We're glad you're enjoying the challenge and finding the training more engaging than passive forms of entertainment. That's exactly the kind of experience we're hoping to create. If you have any additional feedback or suggestions, we'd love to hear them at eigomonogatari@frecre.com . Thanks for giving the app a try! 🧠💪

頭には良いのかもしれない

レベル2の時点で頭が真っ白になる人なので、そこから先の効果は全くわからない

ゲームできません

スタートボタンを押しても反応なしでゲームできません。
改善お願いします!

毎日のルーティンだったのに、ここ数日出来ずに悲しい。

App有問題

開始遊戲position and sound都是反黑無法按下,請速解決不然只好退訂,麻煩了

改善

エラーの改善ありがとうございます!!

せっかく課金したのに。。

バグなのかスコアも履歴もno idと表示され、再インストールしたら起動もできなくなった。返金して欲しい

error:no id

↑と表示されてスマホを再起動させても治らないのでやむなくアプリを再インストールしたところ水色一色の画面になり何も出来ません。楽しくプレイさせてもらってますので、何卒よろしくお願いします。

何これ?

最初に水色の無地の画面が表示されるだけで何も始まらない

何もできない

記憶力を鍛えようとして入れたが、何もできない。バグ?

アプリが開きません

2026年3月28日より、突然アプリが開かなくなりました。1日以上たっても状況は変わりません。どういうことでしょうか?
このアプリは以前から、ちょっとした表示不具合が日常的で、かつ放置されてる印象です。
ゲーム自体は悪くないので、運営(開発)の誠実な対応に期待したいです。

バグが起きています

何日か前からバグでスコアが表示されません
no id という文字列が沢山表示されます。
再インストールしたらバグで開けなくなりました。
早く修正お願いします。

画面がかたまる

数日間は楽しく脳トレやっていたが、突然、アプリを起動すると画面が固まり、ずっと水色の画面のままになってしまっている。
何度もアプリの再インストールもしてみたが、改善しなかった。
修正をお願いいたします🙇‍♀️
(こちらのスマホに問題があったのならごめんなさい🙏)

開けなくたった

急にerrorだらけになったと思ったら、開いても何も表示されなくなりました。
対処法を教えていただきたいです。

アプリを起動してから画面が展開されません

アプリ起動後、画面全体水色一色。いくら待ち続けても先に進みません。アンインストールしても治りません。
毎日楽しく続けていたのに、悲しいです😭早く治してほしいです。