# Crystal Synth XT vs Musical Keyboard

The clearest difference is update cadence: Crystal Synth XT at every 4 months against Musical Keyboard's every 50 months. Crystal Synth XT also leads on iOS requirement (11.0 vs 13.0). Musical Keyboard's advantage is price ($0.99 vs $4.99). On ads, in-app purchases and device support there is nothing between them.

Crystal Synth XT costs $4.99 and Musical Keyboard $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Crystal Synth XT ships an update every 4 months, Musical Keyboard every 50 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | Crystal Synth XT | Musical Keyboard |
| --- | --- | --- |
| Price | $4.99 | **$0.99** |
| Rating | **[4.9 (22 ratings)](https://appshunter.io/ios/app/crystal-synth-xt/id408288370/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 78.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 50 months |
| Monetization | Paid | — |
| Size | 36 MB | 3 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Green Oak Software](https://appshunter.io/developer/355342717) | [Aron Nelson](https://appshunter.io/developer/353420800) |

## 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- 🐌 Outdated interface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


### Musical Keyboard

[App page](https://appshunter.io/ios/app/musical-keyboard/id1498016424)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Crystal Synth XT free?

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

### Is Musical Keyboard free?

Musical Keyboard costs $0.99, with no in-app purchases.

### Do Crystal Synth XT or Musical Keyboard have ads?

Neither Crystal Synth XT nor Musical Keyboard shows ads.

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

Crystal Synth XT ships an update every 4 months, and Musical Keyboard every 50 months. Most recently, Crystal Synth XT was updated on October 29, 2026 and Musical Keyboard on October 29, 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.*