Comparison

N'Back 10 vs Re

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

Head to head
About

N'Back 10

Enhance sensory and working memory with this cognitive training tool. It offers various modes and difficulty levels to challenge your recall abilities by matching current stimuli to those from a specified number of steps prior.

Highlights
  • N'Back training (1-Back to 10-Back)
  • Flash Mode
  • Slow Mode
  • Step Mode
  • Sequence memorization
  • Stimulus matching
Features
Read full description

Improve Sensory Memory & Working Memory using N'Back. ◆1'Back --- 10'Back ◆Flash Mode / Slow Mode / Step Mode Tap the number key matches the one from N steps earlier in the sequence. In 1'Back 1 task1: count & memorize 2 task2: count & memorize 3 __keyboard__: answer for task1 4 task3: count & memorize 5 __keyboard__: answer for task2 6 task4: count & memorize : In 2'Back 1 task1: count & memorize 2 task2: count & memorize 3 task3: count & memorize 4 __keyboard__: answer for task1 5 task4: count & memorize 6 __keyboard__: answer for task2 7 task5: count & memorize :

About

Re

Read full description

“Re:Num7” Welcome to the app! This app challenges your working memory. [Magic Number 7±2] It is believed that we use temporary memory, or “working memory,” to remember information like numbers temporarily—especially when they have no particular meaning in sequence—such as when dialing a phone number from a handwritten note. Cognitive psychology suggests that, while individual differences exist, most people can handle chunks of information—essentially blocks of data—with a capacity of around 7, or 7±2 items. This is known as the “Magic Number 7±2.” This app will help you test the capacity of your working memory. See for yourself if this magic number holds true for you—whether your capacity is larger or smaller. How to play: Present a number with a specified number of digits, hide it, then have the user recall and input the number. If it matches, it's OK. Perform 10 sets of this task and observe the accuracy rate. A perfect game is achieved with all questions correct. Calculate a score based on the number of digits and accuracy rate, and compete with others. Scores can be recorded with a nickname and displayed in a ranking. This is expected to provide the following benefits: ・Gain an estimate of your working memory capacity ・Repeated practice may increase working memory capacity ・Similarly, it may help prevent or slow cognitive decline associated with aging ・Improves concentration, and above all, getting answers right is fun Features: ・Choose your preferred keypad layout for number input: phone layout, calculator layout, or (on iPad) horizontal row layout ・You can select the number of digits, generation method, and display method Digit Count: Each level offers three consecutive digit counts, plus a mode where these three counts are increased in three stages from shortest to longest Generation Method: Choose between a method that minimizes repetition (like drawing cards from a deck) or a completely random method Display Method: Options include showing all digits at once or displaying digits sequentially (step-up). A non-hidden method is also available, but the score will be 0 ・It is divided into four levels based on the range of digit counts. Beginner: Choose 5, 6, or 7 digits, or step-up from 5 to 7 digits. Most players should be able to clear this. Intermediate: Choose 7, 8, or 9 digits, or step-up from 7 to 9 digits. Clearable with effort. Advanced: 9, 10, 11 digits. You can choose step-up from 9 to 11 digits. With effort, some may be clearable. Extra: 11, 12, 13 digits. You can choose step-up from 11 to 13 digits. This likely exceeds human capability. Therefore, it is not locked. Aim to clear even a part of it with effort. ・A tutorial function is provided to make getting started easier. ・While primarily designed for individual play, you can register scores with a custom nickname upon game completion, allowing friendly competition with family or friends. ・We've prepared a mode that's easier to play, though your score will decrease. - Doubles the display time for challenge numbers (score halved) - Displays the C (Clear entry) key to re-enter input (using it reduces that challenge's score by 10%) The challenges themselves are simple and straightforward. However, actually attempting them reveals how difficulty skyrockets with increasing digit counts, offering a fascinating experience.

Screenshots

N'Back 104 screens
Re4 screens

Verdict

The call

The clearest difference is price: Re at Free against N'Back 10's $2.99. Re also leads on update cadence (every 5 weeks vs every 12 months). N'Back 10's advantage is ads (none vs shown). On in-app purchases, device support 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

Re is free to download; N'Back 10 costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

N'Back 10 ships an update every 12 months, Re every 5 weeks. The most recent releases landed on September 11, 2026 and May 17, 2026 respectively.

Scorecard3 real differences · 7 level
N'Back 10 versus Re: the parameters behind the verdict, then further details
ParameterN'Back 10Re
Price$2.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 12 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better17.6
Further details — not scored
Size2 MB9 MB
Age rating4+12+
DeveloperYasuyoshi Ota有限会社知識情報研究所

In-app purchases

None

N'Back 10

No in-app purchases

None

Re

No in-app purchases

Questions

Is N'Back 10 free?
N'Back 10 costs $2.99, with no in-app purchases.
Is Re free?
Re is free to download, with no in-app purchases.
Do N'Back 10 or Re have ads?
Re shows ads; N'Back 10 does not.
Which is updated more often, N'Back 10 or Re?
N'Back 10 ships an update every 12 months, and Re every 5 weeks. Most recently, N'Back 10 was updated on September 11, 2026 and Re on May 17, 2026.

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