# N'Back Butterfly vs Tissue！

The clearest difference is in-app purchases: N'Back Butterfly at none against Tissue！'s 1. N'Back Butterfly also leads on device support. On price and iOS requirement there is nothing between them.

Both are free to download. Tissue！ sells 1 one-off in-app purchase. N'Back Butterfly asks for nothing beyond the download.

## The numbers

| Metric | N'Back Butterfly | Tissue！ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | — |
| Update frequency | Every 10 months | — |
| Monetization | Ad-supported | — |
| Size | 9 MB | 363 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 12+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Yusuke Nakamura](https://appshunter.io/developer/1895544687) |

## What reviewers say

### N'Back Butterfly

[App page](https://appshunter.io/ios/app/nback-butterfly/id853507894)

Enhance your cognitive abilities and combat forgetfulness with this application designed to improve working memory. It utilizes the scientifically recognized n-back task to train your brain's capacity for information recall and manipulation.

**Highlights:** Working memory improvement, N-back task training, Cognitive neuroscience assessment, Continuous performance task

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

**In-app purchases:** none


### Tissue！

[App page](https://appshunter.io/ios/app/tissue/id6763891660)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is N'Back Butterfly free?

N'Back Butterfly is free to download, with no in-app purchases.

### Is Tissue！ free?

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

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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.*