# Negentropy vs Cube Fillz!

The clearest difference is in-app purchases: Cube Fillz! at none against Negentropy's 7. Cube Fillz! also leads on update cadence (every 5 weeks vs every 21 months) and iOS requirement (13.0 vs 15.0). Negentropy's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Negentropy sells 7 one-off in-app purchases. Cube Fillz! asks for nothing beyond the download.

Negentropy ships an update every 21 months, Cube Fillz! every 5 weeks. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Negentropy | Cube Fillz! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/negentropy/id990270078/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 346 MB | 121 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Side Step Studios, LLC](https://appshunter.io/developer/912241443) | [一雄 胡](https://appshunter.io/developer/1370815535) |

## What reviewers say

### Negentropy

[App page](https://appshunter.io/ios/app/negentropy/id990270078)

Explore an old house by solving word puzzles in each room. Rearrange letters to escape entropy and advance to the next challenge. Can you master the wordplay to progress?

**Highlights:** Room-based puzzles, Letter rearrangement, Word formation, Progressive challenges, Escape entropy

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Puzzle Set 1 | $0.99 | one-time |
| Puzzle Set 2 | $0.99 | one-time |
| Puzzle Set 3 | $0.99 | one-time |
| Puzzle Set 4 | $0.99 | one-time |
| Puzzle Set 5 | $0.99 | one-time |
| Puzzle Set 6 | $0.99 | one-time |
| Puzzle Set 7 | $0.99 | one-time |


### Cube Fillz!

[App page](https://appshunter.io/ios/app/cube-fillz/id6743929574)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Negentropy free?

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

### Is Cube Fillz! free?

Cube Fillz! is free to download, with no in-app purchases.

### Do Negentropy or Cube Fillz! have ads?

Cube Fillz! shows ads; Negentropy does not.

### Which is updated more often, Negentropy or Cube Fillz!?

Negentropy ships an update every 21 months, and Cube Fillz! every 5 weeks. Most recently, Negentropy was updated on October 3, 2026 and Cube Fillz! on October 10, 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.*