Comparison

N vs NBack 3D

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

Head to head
About

N

Features
Read full description

Features of Memory Backup • Three engaging games that help train working memory • Designed to challenge both teenagers and adults (ages 13+) • Tap whenever you see the number you saw 1, 2, 3, or more numbers before • Helps train attention and memory skills • Difficulty level is automatically adjusted • A Two-Player Option is available • Scores are automatically saved and can be emailed Explore this fun game and build your memory power. Can you reach the highest level? Are you a memory genius? Prove it with this brain building game. The games will automatically adjust the difficulty level and provide you with new challenges to test your memory. And as the game progresses, you will need to think faster and faster. You can always test yourself and set the game to the highest level of difficulty. Play with a friend and find out who has the best memory. Each round must be completed for your score to be saved in single player mode. Please note that no grades are saved in two player mode. Two player mode only records which Player (1 or 2) won after the match is completed. A training session is completed only when the program is stopped and then removed from memory. If the program is left open in the background and it is selected, then the last session started will be continued. The app will start off with a 60 minute trial version. You can modify the options and run the games during this trial period. Once the trial has ended, you will need to make a one-time in-app purchase to unlock the games for unlimited use.

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 :

Screenshots

N4 screens
NBack 3D3 screens

Verdict

The call

The clearest difference is ads: N at none against NBack 3D's shown. N also leads on iOS requirement (9.0 vs 15.6). NBack 3D's advantage is update cadence (every 10 months vs every 39 months). On price, 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. N sells 1 one-off in-app purchase and NBack 3D sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

N ships an update every 39 months, NBack 3D every 10 months. The most recent releases landed on September 28, 2026 and September 30, 2026 respectively.

Scorecard3 real differences · 7 level
N versus NBack 3D: the parameters behind the verdict, then further details
ParameterNNBack 3D
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 39 monthsEvery 10 months — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.6
Further details — not scored
Size51 MB5 MB
Age rating4+4+
DeveloperBrainTrain Inc.Yasuyoshi Ota

In-app purchases

1 purchases

N

One-time1
  • Full Version$2.99
1 purchases

NBack 3D

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

Questions

Is N free?
N is free to download, with in-app purchases available.
Is NBack 3D free?
NBack 3D is free to download, with in-app purchases available.
Do N or NBack 3D have ads?
NBack 3D shows ads; N does not.
Which is updated more often, N or NBack 3D?
N ships an update every 39 months, and NBack 3D every 10 months. Most recently, N was updated on September 28, 2026 and NBack 3D on September 30, 2026.

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