# Crystal Synth XT vs Koto Master

The clearest difference is ads: Crystal Synth XT at none against Koto Master's shown. Koto Master's advantage is price ($2.99 vs $4.99). On in-app purchases, device support and iOS requirement there is nothing between them.

Crystal Synth XT costs $4.99 and Koto Master $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Crystal Synth XT | Koto Master |
| --- | --- | --- |
| Price | $4.99 | **$2.99** |
| Rating | **[4.9 (20 ratings)](https://appshunter.io/ios/app/crystal-synth-xt/id408288370/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 78.4% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | — |
| Monetization | Paid | — |
| Size | 36 MB | 130 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Green Oak Software](https://appshunter.io/developer/355342717) | [SENSOR NOTES JOINT STOCK COMPANY](https://appshunter.io/developer/1578811305) |

## 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- 🐌 Outdated interface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


### Koto Master

[App page](https://appshunter.io/ios/app/koto-master/id6447333997)

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

**In-app purchases:** none


## Frequently asked questions

### Is Crystal Synth XT free?

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

### Is Koto Master free?

Koto Master costs $2.99, with no in-app purchases.

### Do Crystal Synth XT or Koto Master have ads?

Koto Master shows ads; Crystal Synth XT does not.

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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.*