Comparison

NBack 3D vs N

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

Head to head
About

NBack 3D

This app challenges your memory by requiring you to count 3D shapes of specific colors. As the 'N' value increases, the difficulty escalates, testing your ability to recall past stimuli in a sequence.

Highlights
  • N-Back memory challenge
  • 3D shape and color recognition
  • Increasing difficulty levels
  • Sequence memorization
  • Cognitive skill enhancement
Features
Read full description

The task is only to count the 3D shapes of the specified shape and color, but as the N of the N ‘Back increases, it becomes more difficult. *N’Back : The current answer matches the one from N steps earlier in the sequence. *1’Back 1 task1: count & memorize 2 task2: count & memorize 3 answer for task1 4 task3: count & memorize 5 answer for task2 6 task4: count & memorize : *2’Back 1 task1: count & memorize 2 task2: count & memorize 3 task3: count & memorize 4 answer for task1 5 task4: count & memorize 6 answer for task2 7 task5: count & memorize :

About

N

Features
Read full description

Equations keep coming, and you answer the one you saw a few turns ago while calculating the next. Memorising and calculating at the same time, a dual task that keeps your head working. This is the N-back task, a working memory exercise. SLEEP & SCORE (APPLE HEALTH) - Reads sleep and steps from Apple Health. "Sleep & Score" in the Review tab shows last night's sleep, today's steps, and your accuracy by how long you slept - "What Health reveals" answers questions from your own records, such as how many hours of sleep make you sharpest and how far two short nights pull your score down (Premium) - Saves how your mind feels after each round to Apple Health as State of Mind - Health data stays on this device and is never sent anywhere. Not for medical use KNOW YOUR MENTAL CONDITION - After every round, slide along a color band to record how your mind feels, from foggy to clear - "When your mind feels clear" ranks when you most often feel clear, such as mornings, your first round of the day, or after a break - "Mood and score" plots each round so you can check whether clearer rounds score higher THREE INPUT MODES - Tap: answer quickly with number buttons - Writing: write the digit on screen with your finger - Listening: the equation is read aloud and never shown. Keep your eyes closed, listen, remember, and write BUILT FOR HABIT - One short session a day - Streak counting - Record how your head feels after each session WHAT YOU LEAVE BEHIND - A graph of how far up the levels you have climbed - The hours you tend to practise, and total time - A calendar showing which days you played WHERE YOU STAND - Connect Game Center to see your rank in the world - Today, this week, and all time - Ranks are free for everyone INSIGHTS - Once enough sessions pile up, the app names a pattern you would not notice yourself - Accuracy runs higher on mornings; a level you lost tends to return after a rest day - Differences between levels are factored out, so moving up alone is never called "doing well" - Available on devices with Apple Intelligence, processed entirely on device MAKE IT YOURS - Set the number of questions and the time limit - Choose a starting level, up to the highest you have reached - Three colour themes - iPhone and iPad 1 5 minutes a day is enough to start. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://note.com/toastar/n/n9e6b03d99470

Screenshots

NBack 3D3 screens
N4 screens

Verdict

The call

The clearest difference is update cadence: N at every 8 days against NBack 3D's every 10 months. NBack 3D's advantage is iOS requirement (15.6 vs 26.0). On price, ads, in-app purchases and device support 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. NBack 3D sells 1 one-off in-app purchase and N sells 1 in-app purchase, starting at $7.49 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

NBack 3D ships an update every 10 months, N every 8 days. The most recent releases landed on November 6, 2026 and November 12, 2026 respectively.

Scorecard2 real differences · 8 level
NBack 3D versus N: the parameters behind the verdict, then further details
ParameterNBack 3DN
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 10 monthsEvery 8 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better26.0
Further details — not scored
Size5 MB28 MB
Age rating4+4+
DeveloperYasuyoshi Otachunson yamada

In-app purchases

1 purchases

NBack 3D

One-time1
  • Extend to 20'Back & Remove Ads$2.99
1 purchases

N

Subscriptions1
  • 1ヶ月プラン14 Days trial$7.491 Month

Questions

Is NBack 3D free?
NBack 3D is free to download, with in-app purchases available.
Is N free?
N is free to download, with in-app purchases available.
Do NBack 3D or N have ads?
Both NBack 3D and N show ads.
Which is updated more often, NBack 3D or N?
NBack 3D ships an update every 10 months, and N every 8 days. Most recently, NBack 3D was updated on November 6, 2026 and N on November 12, 2026.

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