N-Back Challenge 4+

Raise your IQ in 20 days


    • 4.6 • 32 Ratings
    • Free
    • Offers In-App Purchases

iPhone Screenshots


The N-Back Challenge provides a special type of cognitive training, “dual n-back,” that helps you raise your IQ in just a few minutes per day. Sounds implausible? The N-Back Challenge is based on a decade’s worth of scientific studies, published in top peer-reviewed journals, including Nature. (For more details, see https://nbackchallenge.com/science.)

The catch? It’s no fun at all! Indeed, the training is designed to be maximally exhausting. If you are determined enough to make it through 20 sessions, however, science suggests that you stand to reap powerful benefits.

Intelligence is the ultimate cognitive ability: You need it to learn, reason, solve novel problems, and see connections. Higher IQs have been linked to improved academic achievement, professional success, and even better health. Since it will take you just 7 hours, in total, to complete the N-Back Challenge, not much more than the length of a single school day, it may prove to be the best investment of time you’ve ever made!

SCIENTIFICALLY SOUND: Not only has the dual n-back paradigm been validated in top peer-reviewed journals, but our two founders – both PhDs, one with a focus on neuroscience, the other with a focus on higher education – have taken particular care to thoroughly align the app with the prevailing scientific research.

TRACK YOUR PROGRESS: In order to help you stay motivated, the N-Back Challenge allows you to visually monitor your progress over time, build up “streaks,” and compare yourself against other learners across various stats.

COMPETE AGAINST YOUR FRIENDS: Perhaps the most powerful way of making sure you remain motivated to complete the Challenge is to tackle it together with friends or colleagues. To make it more fun, we’ve provided leaderboards that allow you to compete based on who has completed the most sessions, racked up the longest streak, and more.

CUSTOMIZE YOUR EXPERIENCE: The N-Back Challenge allows you to choose between different voices across multiple languages, turn on notifications, and customize their timing and style. There are advanced settings for turning on instant button feedback, controlling the n-back level, and tweaking the game speed. And if you are too busy to complete one session every day, you may switch to the Weekly Habit, which gives you a full week to complete each session.


… A PARENT? Give your children an edge at school or university by nudging them to complete the N-Back Challenge. Indeed, why not tackle the Challenge together as a family?

… A GRANDCHILD? Help your grandparents (and other older relatives) fight cognitive decline by introducing them to dual n-back. (See https://nbackchallenge.com/decline.)

… A KNOWLEDGE WORKER? Share the N-Back Challenge with your HR department. Dual n-back may well be the single most cost-effective way of making knowledge workers more productive. (See https://nbackchallenge.com/work.)

… A TEACHER? Prepare your students for a world of rapid technological change by using dual n-back to hone their problem-solving skills. You can have a big impact, with a minimal investment of time! (See https://nbackchallenge.com/class.)

HOW IT WORKS: The N-Back Challenge is free as long as you stick to the program. When you miss or delay a session, we ask you to support us with a “coffee,” which you can buy in-app or earn — for example, by using the Share link in the Settings to invite friends. (Each of you will receive a free coffee.) You can also unlock unlimited free breaks by buying us a “pizza.”

CUSTOMER SUPPORT: Do you have any questions or suggestions? Feel an inexplicable urge to vent your frustrations about the difficulty of dual n-back? Like to say hello? We’re happy to hear from you! Just drop us a note at support@nbackchallenge.com.

ADDITIONAL RESOURCES: To learn more about dual n-back and the N-Back Challenge, browse our repository of articles at https://nbackchallenge.com/articles.

What’s New

Version 1.6.0

Fixed a handful of bugs, mostly related to voice selection.

Ratings and Reviews

4.6 out of 5
32 Ratings

32 Ratings

DLCsucks ,

The best n-back app I’ve used

I’ve downloaded probably 10 different n-back apps over the years, and I recently found this one. It’s good. It’s a good combination of aesthetically pleasing and scientifically grounded while also having just the right amount of motivation. I’m surprised how motivating it is to want to stick with the streak in order not to have to “spend a coffee”. I’ve definitely felt the most consistent with this app as opposed to other similars.

Also, at the end of a round, they give you an optional article to read about the science behind the tasks, and I really look forward to getting to it. It’s kind of like a little science snack reward for practicing.

Developer Response ,

Dear user, thank you so much for your kind words! :) They mean a lot to us, we indeed put a lot of love and effort into creating N-Back! We wish you continued success with your training!

Christopher Chao ,

Best N-back experience

There are no fancy bells or whistles. You don’t have to subscribe to any monthly service. This app is a plain n-back experience with quality of life changes not present in your typical computer software. Best of all, the developers tailor the app in a way that matches the actual n-back trials known to improve working memory and fluid intelligence. Whether you agree with the findings, this is the app to use. It is incredibly cheap if you’re considering purchasing the full version.

Developer Response ,

Hi Christopher! Thank you very much, we really appreciate your kind words! We indeed put a lot of love, time, and effort into creating N-Back Challenge. We wish you continued success with your training! Whenever you have any questions, please feel free to ping us at feedback@nbackchallenge.com

someprimate999 ,

Amazing app

I rarely leave reviews on stuff unless it’s atrocious or marvelous, this app is the latter. Thoughtful design and incentive system, and clearly built to be helpful rather than be a cash grab. Love it!

App Privacy

The developer, Rivuspurus, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Purchases
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Location
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


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    Challenge friends and check leaderboards and achievements.

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