# NBack 3D > Memory training game based on recalling past stimuli in a sequence. (iPhone/iPad app by Yasuyoshi Ota.) - Source: https://appshunter.io/ios/app/nback-3d/id1407606652 (this page in markdown: same URL + `.md`) - Developer: [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) - Category: Education, Games, Action, Trivia - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 15.6 · 5 MB - Languages: American English, Japanese - Released: 2018-08-01 - Data updated: 2026-08-31 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/nback-3d/id1407606652/reviews.md ## What is NBack 3D? 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 : ## Key features - N-Back memory challenge - 3D shape and color recognition - Increasing difficulty levels - Sequence memorization - Cognitive skill enhancement ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Extend to 20'Back & Remove Ads | $2.99 | one-time | ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/nback-3d/id1407606652/reviews.md ### 5/5 — Feature request *2025-05-06* Hi I’m a paying customer. I was curious if you would be open to adding multiple guess functionality and a “show answer” functionality which lets you see the “Back” 1 symbol at a time? This can be useful to notice patterns and see where we went wrong when answering. ## Frequently asked questions about NBack 3D ### What is the NBack 3D game about? NBack 3D is a memory game where you count 3D shapes of a specific color. The challenge increases as the 'N' value, representing how far back in the sequence you need to recall, gets higher. ### How does NBack 3D work? The game presents a sequence of 3D shapes. You must identify if the current shape matches the one presented 'N' steps earlier in the sequence. This tests your working memory and ability to retain information. ### What devices does NBack 3D support? NBack 3D is available on iPhone, iPad, and iPod devices, making it accessible for a wide range of Apple users. ### Is NBack 3D suitable for children? Yes, NBack 3D has an age rating of 4+, indicating it is appropriate for young users and can be a fun way to develop cognitive skills. ### How often is NBack 3D updated? The latest version of NBack 3D is 1.1.7, and it was last updated on December 17, 2025. This suggests active development and potential for future improvements. ### Does NBack 3D have ads? Yes, NBack 3D contains advertisements. Users may encounter ads while playing the game. ### What is the user feedback on NBack 3D? NBack 3D has received a perfect rating of 5.0 stars from one review, indicating a highly positive initial user experience. ### Can I play NBack 3D offline? The provided information does not specify offline play capabilities for NBack 3D. However, due to its nature as a memory and counting game, it may function without an internet connection. ## Version history (last 5 releases) ### 1.1.8 — 2026-08-28 performance improvements ### 1.1.7 — 2025-12-17 performance improvements ### 1.1.6 — 2025-10-22 performance improvement ### 1.1.5 — 2025-01-05 performance improvement ### 1.1.4 — 2024-02-18 performance improvements ## Apps similar to NBack 3D | App | Rating | Price | Category | | --- | --- | --- | --- | | [Better Brain Lite](https://appshunter.io/ios/app/better-brain-lite/id307920888) | 3.6 (5) | Free | Education | | [N-Back Training](https://appshunter.io/ios/app/n-back-training/id1627478554) | — | Free | Education | | [Dual N-Back Extreme](https://appshunter.io/ios/app/dual-n-back-extreme/id6744034751) | 4.6 (9) | Free | Education | | [NBack³: Memory Training Game](https://appshunter.io/ios/app/nback-memory-training-game/id6745750227) | — | Free | Education | | [Ultra N Back - Brain Training](https://appshunter.io/ios/app/ultra-n-back-brain-training/id6751448185) | — | Free | Education | | [点つなぎ](https://appshunter.io/ios/app/id6478905217) | — | Free | Education | ## More apps by Yasuyoshi Ota - [Kinetic Visual Acuity](https://appshunter.io/ios/app/kinetic-visual-acuity/id315045189) - [Kinetic Visual Acuity Lite](https://appshunter.io/ios/app/kinetic-visual-acuity-lite/id319026009) - [Amida Mikan](https://appshunter.io/ios/app/amida-mikan/id350563115) - [Try Hairstyle Lite](https://appshunter.io/ios/app/try-hairstyle-lite/id350729683) - [Amida Mikann](https://appshunter.io/ios/app/amida-mikann/id358691639) - [2 Digit Multiplication](https://appshunter.io/ios/app/2-digit-multiplication/id395133470) All apps by Yasuyoshi Ota: https://appshunter.io/developer/1500357652 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*