Apps by Yasuyoshi Ota
NBack 3D app icon

Education

NBack 3D

Yasuyoshi Ota

Free download 5.00 · 1 storefront · 1 rating In-app purchases unconfirmed
Open on Apple

About this app

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 :

Latest release

What’s New

Version 1.1.7 Dec 17, 2025

performance improvements

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
1 ratings
1 Aug 20, 2026 · 1 ratings Aug 20, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free
Price history
Current Free
Free Aug 20, 2026 · Free Aug 20, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 20, 2026 · 4:02 AM Free

Screenshots

NBack 3D iPhone screenshotNBack 3D iPhone screenshotNBack 3D iPhone screenshot NBack 3D iPad screenshotNBack 3D iPad screenshotNBack 3D iPad screenshot