# Solfeggio vs Serenity Engine

The clearest difference is in-app purchases: Serenity Engine at none against Solfeggio's 3. Solfeggio's advantage is ratings volume (237 vs 1) and iOS requirement (15.0 vs 17.0). On price, rating, ads and device support there is nothing between them.

Both are free to download. Solfeggio sells 3 in-app purchases, starting at $14.99 per month. Serenity Engine asks for nothing beyond the download.

Serenity Engine holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Solfeggio has 237 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Solfeggio | Serenity Engine |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (237 ratings)](https://appshunter.io/ios/app/solfeggio-healing-frequencies/id6476548391/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/serenity-engine/id6758733840/reviews)** |
| Number of ratings | **237** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Freemium | **Free** |
| Size | 119 MB | 120 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Zhuzhou Yiqi Network Technology Co., Ltd.](https://appshunter.io/developer/1655498857) | [ANDREW BRODIE LANDRY](https://appshunter.io/developer/1874662777) |

## What reviewers say

### Solfeggio

[App page](https://appshunter.io/ios/app/solfeggio-healing-frequencies/id6476548391)

Discover a world of sound designed for relaxation and inner peace. Explore curated frequencies, ambient soundscapes, and natural tones to calm your mind, enhance focus, and achieve a state of balance. Create your own unique sound environments with a built-in studio.

**Highlights:** Extensive library of frequency presets, Explore harmonic frequencies (e.g., 432Hz, 528Hz), Blend frequencies with nature sounds, Built-in sound studio for mixing, Minimal, calming interface, Supports mindfulness and meditation

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Heal Frequency Premium Monthly | $14.99 | per month |
| Heal Frequency Premium Annual | $34.99 | per year |
| HealFrequency Premium Lifetime | $59.99 | one-time |


### Serenity Engine

[App page](https://appshunter.io/ios/app/serenity-engine/id6758733840)

Create immersive ambient soundscapes for focus, relaxation, and sleep. Features curated sound presets, binaural beats for brainwave tuning, and a gentle sleep timer. Enjoy a beautiful visualizer and a distraction-free, ad-free interface.

**Highlights:** Curated ambient soundscapes, Binaural beats for brainwave tuning, Focus, Relax, and Sleep modes, Customizable sleep timer, Real-time audio visualizer, Minimalist, ad-free interface

**In-app purchases:** none


## Frequently asked questions

### Is Solfeggio free?

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

### Is Serenity Engine free?

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

### Which has better reviews, Solfeggio or Serenity Engine?

Serenity Engine is rated higher. Solfeggio averages 4.8 out of 5 from 237 ratings, while Serenity Engine averages 5.0 from 1 ratings.

### Do Solfeggio or Serenity Engine have ads?

Neither Solfeggio nor Serenity Engine shows ads.

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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.*