# N'Back Butterfly vs Math Sprint Challenge

The clearest difference is update cadence: Math Sprint Challenge at weekly against N'Back Butterfly's every 10 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

N'Back Butterfly ships an update every 10 months, Math Sprint Challenge weekly. The most recent releases landed on October 25, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | N'Back Butterfly | Math Sprint Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 9 MB | 21 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Henrique Pedro](https://appshunter.io/developer/1708462258) |

## 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


### Math Sprint Challenge

[App page](https://appshunter.io/ios/app/math-sprint-challenge/id6758415290)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is N'Back Butterfly free?

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

### Is Math Sprint Challenge free?

Math Sprint Challenge is free to download, with no in-app purchases.

### Do N'Back Butterfly or Math Sprint Challenge have ads?

Both N'Back Butterfly and Math Sprint Challenge show ads.

### Which is updated more often, N'Back Butterfly or Math Sprint Challenge?

N'Back Butterfly ships an update every 10 months, and Math Sprint Challenge weekly. Most recently, N'Back Butterfly was updated on October 25, 2026 and Math Sprint Challenge on October 19, 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.*