# N'Back Butterfly vs QuickDodger

The clearest difference is update cadence: QuickDodger at every 2 months against N'Back Butterfly's every 10 months. On price, review sentiment, ads and in-app purchases 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, QuickDodger every 2 months. The most recent releases landed on October 20, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | N'Back Butterfly | QuickDodger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/quickdodger/id6749777920/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | Ad-supported | Ad-supported |
| Size | 9 MB | 26 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) | [Jaylin Murry](https://appshunter.io/developer/1831393594) |

## 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


### QuickDodger

[App page](https://appshunter.io/ios/app/quickdodger/id6749777920)

A fast-paced arcade survival game where players swipe to move and dodge falling obstacles. Survive for as long as possible as the game's speed and intensity increase. Utilize power-ups to aid your survival.

**Highlights:** Swipe controls for movement, Increasing game difficulty, Invisibility power-up, Screen-clearing explosions, High score tracking, Optional rewarded ads to continue

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

**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 QuickDodger free?

QuickDodger is free to download, with no in-app purchases.

### Do N'Back Butterfly or QuickDodger have ads?

Both N'Back Butterfly and QuickDodger show ads.

### Which is updated more often, N'Back Butterfly or QuickDodger?

N'Back Butterfly ships an update every 10 months, and QuickDodger every 2 months. Most recently, N'Back Butterfly was updated on October 20, 2026 and QuickDodger on October 9, 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.*