# Sensorimotor Reactions vs N'Back Fan

The clearest difference is ads: Sensorimotor Reactions at none against N'Back Fan's shown. Sensorimotor Reactions also leads on update cadence (monthly vs every 9 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Sensorimotor Reactions sells 1 one-off in-app purchase and N'Back Fan sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Sensorimotor Reactions ships an update monthly, N'Back Fan every 9 months. The most recent releases landed on October 7, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Sensorimotor Reactions | N'Back Fan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 9 months |
| Size | 2 MB | 7 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Viacheslav Romanenko](https://appshunter.io/developer/1046372418) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### Sensorimotor Reactions

[App page](https://appshunter.io/ios/app/sensorimotor-reactions/id1547238786)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Data management | $1.99 | one-time |


### N'Back Fan

[App page](https://appshunter.io/ios/app/nback-fan/id6449070102)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| remove ads and extend to 12 | $1.99 | one-time |


## Frequently asked questions

### Is Sensorimotor Reactions free?

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

### Is N'Back Fan free?

N'Back Fan is free to download, with in-app purchases available.

### Do Sensorimotor Reactions or N'Back Fan have ads?

N'Back Fan shows ads; Sensorimotor Reactions does not.

### Which is updated more often, Sensorimotor Reactions or N'Back Fan?

Sensorimotor Reactions ships an update monthly, and N'Back Fan every 9 months. Most recently, Sensorimotor Reactions was updated on October 7, 2026 and N'Back Fan on October 27, 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.*