# N'Back Butterfly vs ComboTangle

The clearest difference is ads: ComboTangle at none against N'Back Butterfly's shown. ComboTangle also leads on update cadence (monthly vs every 10 months) and monetization model (free vs ad-supported). On price, review sentiment, 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, ComboTangle monthly. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | N'Back Butterfly | ComboTangle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (24 ratings)](https://appshunter.io/ios/app/combotangle/id6680155415/reviews)** |
| Number of ratings | — | **24** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 9 MB | 7 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Ranjeetha Seshadri](https://appshunter.io/developer/1768172782) |

## 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


### ComboTangle

[App page](https://appshunter.io/ios/app/combotangle/id6680155415)

Engage in a challenging puzzle game with an immense number of possible boards. This brain teaser is designed to sharpen your focus and cognitive skills. Compete with friends to solve puzzles in fewer moves.

**Highlights:** Vast number of possible boards, Sharpens mind and focus, Competitive multiplayer mode, Unique button operations to discover, Support for user questions

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

**In-app purchases:** none

**What reviewers like**

- 🧠 Unique game concept
- 👨‍👩‍👧‍👦 Fun for all ages
- 📚 Good documentation
- 👍 Easy to get started
- 😊 Highly entertaining

**What reviewers complain about**

- 📖 Rules might be hard to grasp
- ⏳ Waiting for new updates


## Frequently asked questions

### Is N'Back Butterfly free?

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

### Is ComboTangle free?

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

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

N'Back Butterfly shows ads; ComboTangle does not.

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

N'Back Butterfly ships an update every 10 months, and ComboTangle monthly. Most recently, N'Back Butterfly was updated on November 1, 2026 and ComboTangle on November 4, 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.*