# A320 Systems Study & Exam vs Quantum Sound Therapy

The clearest difference is in-app purchases: Quantum Sound Therapy at none against A320 Systems Study & Exam's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. A320 Systems Study & Exam sells 1 one-off in-app purchase. Quantum Sound Therapy asks for nothing beyond the download.

A320 Systems Study & Exam ships an update every 5 months, Quantum Sound Therapy every 4 months. The most recent releases landed on October 28, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | A320 Systems Study & Exam | Quantum Sound Therapy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quantum-sound-therapy/id6761883356/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | — | Free |
| Size | 5 MB | 129 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Studio BabDreams](https://appshunter.io/developer/431517875) | [Quantum Sound Therapy](https://appshunter.io/developer/1262473859) |

## What reviewers say

### A320 Systems Study & Exam

[App page](https://appshunter.io/ios/app/a320-systems-study-and-exam/id6748674155)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all questions | $12.99 | one-time |


### Quantum Sound Therapy

[App page](https://appshunter.io/ios/app/quantum-sound-therapy/id6761883356)

Connect with a like-minded community focused on frequency, healing, and personal transformation. Access transformational content, stay updated on events, and find ongoing support for coherence and growth.

**Highlights:** Community connection, Event updates and access, Transformational content, Support for coherence and growth, Energetic recalibration, Sound-based transformation

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

**In-app purchases:** none


## Frequently asked questions

### Is A320 Systems Study & Exam free?

A320 Systems Study & Exam is free to download, with in-app purchases available.

### Is Quantum Sound Therapy free?

Quantum Sound Therapy is free to download, with no in-app purchases.

### Do A320 Systems Study & Exam or Quantum Sound Therapy have ads?

Neither A320 Systems Study & Exam nor Quantum Sound Therapy shows ads.

### Which is updated more often, A320 Systems Study & Exam or Quantum Sound Therapy?

A320 Systems Study & Exam ships an update every 5 months, and Quantum Sound Therapy every 4 months. Most recently, A320 Systems Study & Exam was updated on October 28, 2026 and Quantum Sound Therapy on October 14, 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.*