# Negentropy vs Otteretto

The clearest difference is update cadence: Otteretto at every 9 months against Negentropy's every 21 months. Otteretto also leads on ratings volume (8 vs 2). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Negentropy sells 7 one-off in-app purchases and Otteretto sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Negentropy against 5.0 for Otteretto. Both are backed by a comparable volume of ratings — 2 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Negentropy ships an update every 21 months, Otteretto every 9 months. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Negentropy | Otteretto |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/negentropy/id990270078/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/otteretto/id1608448950/reviews) |
| Number of ratings | 2 | **8** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 9 months** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 346 MB | 14 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Side Step Studios, LLC](https://appshunter.io/developer/912241443) | [Christopher Klimowski](https://appshunter.io/developer/1608448952) |

## 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 |


### Otteretto

[App page](https://appshunter.io/ios/app/otteretto/id1608448950)

A unique puzzle game where players create palindromes using letters and otters. It offers multiple endlessly replayable game modes, including daily challenges and competitive leaderboards.

**Highlights:** Unique palindrome puzzle mechanics, Five endlessly replayable game modes, Daily global competition, Logical reasoning puzzles, Competitive cross-platform leaderboards, No ads or microtransactions

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game Upgrade | $2.99 | one-time |


## Frequently asked questions

### Is Negentropy free?

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

### Is Otteretto free?

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

### Which has better reviews, Negentropy or Otteretto?

Negentropy and Otteretto are both rated 5.0 out of 5 on the App Store, from 2 and 8 ratings respectively.

### Do Negentropy or Otteretto have ads?

Neither Negentropy nor Otteretto shows ads.

### Which is updated more often, Negentropy or Otteretto?

Negentropy ships an update every 21 months, and Otteretto every 9 months. Most recently, Negentropy was updated on October 3, 2026 and Otteretto on October 12, 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.*