# N'Back 10 vs シンプルFLASH暗算

The clearest difference is price: シンプルFLASH暗算 at Free against N'Back 10's $2.99. シンプルFLASH暗算 also leads on update cadence (fortnightly vs every 12 months) and device support (3 vs 1). N'Back 10's advantage is ads (none vs shown). On in-app purchases and iOS requirement there is nothing between them.

シンプルFLASH暗算 is free to download; N'Back 10 costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

N'Back 10 ships an update every 12 months, シンプルFLASH暗算 fortnightly. The most recent releases landed on September 11, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | N'Back 10 | シンプルFLASH暗算 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nback-10/id588985886/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 2 MB | 4 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [TSUKASA YONAHA](https://appshunter.io/developer/1835823966) |

## What reviewers say

### N'Back 10

[App page](https://appshunter.io/ios/app/nback-10/id588985886)

Enhance sensory and working memory with this cognitive training tool. It offers various modes and difficulty levels to challenge your recall abilities by matching current stimuli to those from a specified number of steps prior.

**Highlights:** N'Back training (1-Back to 10-Back), Flash Mode, Slow Mode, Step Mode, Sequence memorization, Stimulus matching

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

**In-app purchases:** none


### シンプルFLASH暗算

[App page](https://appshunter.io/ios/app/flash/id6751562239)

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

**In-app purchases:** none


## Frequently asked questions

### Is N'Back 10 free?

N'Back 10 costs $2.99, with no in-app purchases.

### Is シンプルFLASH暗算 free?

シンプルFLASH暗算 is free to download, with no in-app purchases.

### Do N'Back 10 or シンプルFLASH暗算 have ads?

シンプルFLASH暗算 shows ads; N'Back 10 does not.

### Which is updated more often, N'Back 10 or シンプルFLASH暗算?

N'Back 10 ships an update every 12 months, and シンプルFLASH暗算 fortnightly. Most recently, N'Back 10 was updated on September 11, 2026 and シンプルFLASH暗算 on September 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.*