# Calculation Training For Brain vs NBack³

The clearest difference is update cadence: NBack³ at every 4 days against Calculation Training For Brain's every 5 months. Calculation Training For Brain's advantage is review sentiment (86% vs 71%) and iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Calculation Training For Brain sells 1 one-off in-app purchase and NBack³ sells 1 in-app purchase, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

Calculation Training For Brain ships an update every 5 months, NBack³ every 4 days. The most recent releases landed on August 4, 2026 and August 14, 2026 respectively.

## The numbers

| Metric | Calculation Training For Brain | NBack³ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (14 ratings)](https://appshunter.io/ios/app/calculation-training-for-brain/id1159243202/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | **86.0% of reviews** | 71.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 5 months | **Every 4 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 97 MB | 20 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Masaki Kanno](https://appshunter.io/developer/843112443) | [Taiki Nishimura](https://appshunter.io/developer/1780302048) |

## What reviewers say

### Calculation Training For Brain

[App page](https://appshunter.io/ios/app/calculation-training-for-brain/id1159243202)

Practice basic math calculations with this engaging app designed for all ages. Improve mental math skills through fun, game-like exercises. Choose your difficulty, duration, and calculation type for daily brain training.

**Highlights:** Basic math calculation practice, Suitable for all ages, Game-like engagement, Customizable difficulty, duration, and calculation type, Addition, subtraction, multiplication, division, and mixed operations

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |


### NBack³

[App page](https://appshunter.io/ios/app/nback-memory-training-game/id6745750227)

This brain training app uses the scientifically proven Dual N-Back method to enhance cognitive functions like working memory, focus, and decision-making. It offers adjustable difficulty levels and tracks progress with a visually engaging interface.

**Highlights:** Dual N-Back method, Adjustable difficulty (n=1-5), Enhances working memory, Improves inhibitory control, Develops attention skills, Progress tracking, Streak bonus system

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $0.49 | per month |


## Frequently asked questions

### Is Calculation Training For Brain free?

Calculation Training For Brain is free to download, with in-app purchases available.

### Is NBack³ free?

NBack³ is free to download, with in-app purchases available.

### Do Calculation Training For Brain or NBack³ have ads?

Both Calculation Training For Brain and NBack³ show ads.

### Which is updated more often, Calculation Training For Brain or NBack³?

Calculation Training For Brain ships an update every 5 months, and NBack³ every 4 days. Most recently, Calculation Training For Brain was updated on August 4, 2026 and NBack³ on August 14, 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.*