# Not Not vs CyloStack

The clearest difference is in-app purchases: CyloStack at none against Not Not's 10. CyloStack also leads on update cadence (every 6 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Not Not sells 8 one-off in-app purchases. CyloStack asks for nothing beyond the download.

Not Not ships an update every 2 weeks, CyloStack every 6 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Not Not | CyloStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.1K ratings)](https://appshunter.io/ios/app/not-not-a-brain-buster/id1107589341/reviews)** | — |
| Number of ratings | **1.1K** | — |
| Positive reviews | 78.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 75 MB | 9 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Alternative Shift](https://appshunter.io/developer/394617049) | [Rasa Soudi](https://appshunter.io/developer/1861766987) |

## What reviewers say

### Not Not

[App page](https://appshunter.io/ios/app/not-not-a-brain-buster/id1107589341)

Engage your brain with a logic and orientation puzzle game. Swipe your character according to increasingly complex instructions to reach higher levels. Offers two addictive game modes for a satisfying challenge.

**Highlights:** Logic and orientation challenges, Swipe-based character control, Increasingly complex instructions, Classic game mode, Challenge game mode, Addictive gameplay

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $0.99 | one-time |
| Unlock World : The Liar | $0.99 | one-time |
| Emergency Kit | $0.99 | one-time |
| First Aid Kit | $0.99 | one-time |
| Survival Kit | $2.99 | one-time |
| Complete Kit | $4.99 | one-time |
| Immortal Kit | $9.99 | one-time |
| Ultimate Kit | $29.99 | one-time |

**What reviewers like**

- 🧠 Challenges the brain
- 🕹 Engaging and addictive gameplay
- 🕰 Good time-killer
- 👍 Simple yet effective game mechanics

**What reviewers complain about**

- 📺 Excessive ads and monetization
- 🐛 Bugs and technical issues
- 🔄 Language settings reset after each session
- 🔍 Difficulty progression can be uneven

**Reported bugs**

- Game freezes on startup
- Purchased ad removal not working
- Inconsistent swipe/input detection

**Requested features**

- More levels and game modes
- Option to disable music/sound effects
- Improved accessibility for color-blind players


### CyloStack

[App page](https://appshunter.io/ios/app/cylostack/id6795510672)

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

**In-app purchases:** none


## Frequently asked questions

### Is Not Not free?

Not Not is free to download, with in-app purchases available.

### Is CyloStack free?

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

### Do Not Not or CyloStack have ads?

Both Not Not and CyloStack show ads.

### Which is updated more often, Not Not or CyloStack?

Not Not ships an update every 2 weeks, and CyloStack every 6 days. Most recently, Not Not was updated on November 6, 2026 and CyloStack on October 31, 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.*