# Retro N vs NBack 3D

The clearest difference is iOS requirement: Retro N at 13.0 against NBack 3D's 15.6. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Retro N sells 4 one-off in-app purchases and NBack 3D sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Retro N against 5.0 for NBack 3D. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Retro N ships an update every 8 months, NBack 3D every 10 months. The most recent releases landed on September 10, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Retro N | NBack 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/retro-n-back-memory-rangers/id1160120514/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/nback-3d/id1407606652/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 8 months** | Every 10 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 74 MB | 5 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TELULU LLC](https://appshunter.io/developer/1160120513) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### Retro N

[App page](https://appshunter.io/ios/app/retro-n-back-memory-rangers/id1160120514)

Engage in retro-style brain training that makes the N-back task enjoyable. Improve memory, focus, and emotional control through a superhero-themed game. Suitable for all ages, it offers a free, ad-supported experience with optional in-app purchases.

**Highlights:** Retro 8-bit N-back gameplay, Improves memory and focus, Superhero Ranger theme, Up to 3 players on one device, No login or personal data collection, Minimal ads, child-safe

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support for this app (100) | $0.49 | one-time |
| Remove Ads | $2.99 | one-time |
| Support for this app (500) | $2.99 | one-time |
| Support for this app (1000) | $5.99 | one-time |


### NBack 3D

[App page](https://appshunter.io/ios/app/nback-3d/id1407606652)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extend to 20'Back & Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is Retro N free?

Retro 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.

### Which has better reviews, Retro N or NBack 3D?

Retro N and NBack 3D are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Retro N or NBack 3D have ads?

Both Retro N and NBack 3D show ads.

### Which is updated more often, Retro N or NBack 3D?

Retro N ships an update every 8 months, and NBack 3D every 10 months. Most recently, Retro N was updated on September 10, 2026 and NBack 3D on September 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*