# Crystal Synth XT vs AudioZone

The clearest difference is price: AudioZone at Free against Crystal Synth XT's $4.99. AudioZone also leads on update cadence (every 3 days vs every 4 months) and review sentiment (100% vs 78%). Crystal Synth XT's advantage is in-app purchases (none vs 1) and ratings volume (20 vs 3). On rating, ads and device support there is nothing between them.

AudioZone is free to download; Crystal Synth XT costs $4.99 up front. AudioZone sells 1 in-app purchase, starting at $9.99 per month. Crystal Synth XT asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Crystal Synth XT against 5.0 for AudioZone. That said, the two scores are not equally well evidenced: Crystal Synth XT has 20 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 78% of Crystal Synth XT's written reviews are positive against 100% of AudioZone's.

Crystal Synth XT ships an update every 4 months, AudioZone every 3 days. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Crystal Synth XT | AudioZone |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.9 (20 ratings)](https://appshunter.io/ios/app/crystal-synth-xt/id408288370/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/audiozone/id1578123313/reviews)** |
| Number of ratings | **20** | 3 |
| Positive reviews | 78.4% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Paid | **Freemium** |
| Size | 36 MB | 50 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Green Oak Software](https://appshunter.io/developer/355342717) | [Marcus McCallum](https://appshunter.io/developer/1330237690) |

## What reviewers say

### Crystal Synth XT

[App page](https://appshunter.io/ios/app/crystal-synth-xt/id408288370)

Create lush, evolving soundscapes with a powerful semi-modular synthesizer for mobile devices. Explore subtractive and FM synthesis, extensive modulation, and built-in effects. Share sounds with the desktop version and connect MIDI keyboards for a full hardware synth experience.

**Highlights:** Semi-modular synthesis engine, Subtractive and FM synthesis, Extensive modulation control (>90 parameters), Multi-stage envelopes with graphical editors, Tempo-synced envelopes, LFOs, and delays, Built-in effects (chorus, flanger, echo), MIDI keyboard input and virtual MIDI support

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🎶 Fantastic sound quality
- 💡 Innovative breed function
- 🎛️ Deep sound design capabilities
- 🎹 Versatile synth
- ✨ Unique and creative sounds

**What reviewers complain about**

- 🐛 Occasional crashes
- ⚠️ Preset system issues (folders, access)
- 🐌 Outdated interface
- 🔌 Lacks AUv3 support (frequently requested)
- 🔊 Crackling/popping sounds

**Reported bugs**

- App not working, splash screen disappears
- Screen in background
- Envelope points not moving
- Breed fan not working properly
- Crashing on launch

**Requested features**

- AUv3 support
- Update to an AU3 standard
- Newer interface
- Fix breed fan access to all presets
- Fix preset system variations between devices


### AudioZone

[App page](https://appshunter.io/ios/app/audiozone/id1578123313)

Organize and play audio files with advanced effects and note-taking features. Record, mix, and export tracks with a built-in studio. Offers free iCloud backup and optional cloud sync for seamless cross-device access.

**Highlights:** Audio library with custom organization, Rich-text notes per track, Audiophile-grade playback effects, Built-in recording studio with multi-take, Live waveform with gapless looping, Free iCloud backup, Optional Cloud Sync (Pro)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AudioZone Pro | $9.99 | per month |


## Frequently asked questions

### Is Crystal Synth XT free?

Crystal Synth XT costs $4.99, with no in-app purchases.

### Is AudioZone free?

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

### Which has better reviews, Crystal Synth XT or AudioZone?

AudioZone is rated higher. Crystal Synth XT averages 4.9 out of 5 from 20 ratings, while AudioZone averages 5.0 from 3 ratings.

### Do Crystal Synth XT or AudioZone have ads?

Neither Crystal Synth XT nor AudioZone shows ads.

### Which is updated more often, Crystal Synth XT or AudioZone?

Crystal Synth XT ships an update every 4 months, and AudioZone every 3 days. Most recently, Crystal Synth XT was updated on October 6, 2026 and AudioZone 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.*