# HiddenEvolution vs Sound

The clearest difference is review sentiment: Sound at 100% against HiddenEvolution's 0%. Sound also leads on rating (5.0 vs 2.7) and update cadence (every 11 days vs every 2 months). HiddenEvolution's advantage is ratings volume (11 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. HiddenEvolution sells 4 one-off in-app purchases and Sound sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Sound holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 11 and 3 respectively. Written reviews point the same way: 0% of HiddenEvolution's written reviews are positive against 100% of Sound's.

HiddenEvolution ships an update every 2 months, Sound every 11 days. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | HiddenEvolution | Sound |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (11 ratings)](https://appshunter.io/ios/app/hiddenevolution/id6474183957/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sound-o-grm/id6751414998/reviews)** |
| Number of ratings | **11** | 3 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 1.2 GB | 132 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [MOONEE PUBLISHING LTD](https://appshunter.io/developer/1469957859) | [Magic Claw Games Inc.](https://appshunter.io/developer/1834951041) |

## What reviewers say

### HiddenEvolution

[App page](https://appshunter.io/ios/app/hiddenevolution/id6474183957)

Engage your mind with a 3D hidden object puzzle game. Explore colorful mystery worlds, find cleverly concealed items, and train your brain with various difficulty levels and helpful tools. Enjoy hours of relaxing fun.

**Highlights:** 3D hidden object gameplay, Multiple difficulty levels, Unlockable mystery worlds, Hint and magnet tools, Zoom functionality, Hundreds of hidden items

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $4.99 | one-time |
| Mix Bundle | $4.99 | one-time |
| Historian Bundle | $8.99 | one-time |
| Evolution Bundle | $15.99 | one-time |


### Sound

[App page](https://appshunter.io/ios/app/sound-o-grm/id6751414998)

A social game where players record sound effects for words. Friends guess the word, and successful guesses earn in-game currency. Compete to build the longest streak of correct guesses.

**Highlights:** Record sound effects, Guess words from sounds, Play with friends, Earn in-game currency, Build streaks

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 90 Soins for Sound-O-Grm | $0.99 | one-time |
| 980 Soins for Sound-O-Grm | $4.99 | one-time |


## Frequently asked questions

### Is HiddenEvolution free?

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

### Is Sound free?

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

### Which has better reviews, HiddenEvolution or Sound?

Sound is rated higher. HiddenEvolution averages 2.7 out of 5 from 11 ratings, while Sound averages 5.0 from 3 ratings.

### Do HiddenEvolution or Sound have ads?

Both HiddenEvolution and Sound show ads.

### Which is updated more often, HiddenEvolution or Sound?

HiddenEvolution ships an update every 2 months, and Sound every 11 days. Most recently, HiddenEvolution was updated on November 4, 2026 and Sound on November 5, 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.*