# Crystal Synth XT vs Electron ECHO mini piano

Crystal Synth XT and Electron ECHO mini piano both sit at 4.9 stars, but that hides the real split: 93% of Electron ECHO mini piano's written reviews are positive against 78% of Crystal Synth XT's. Electron ECHO mini piano also leads on price ($1.99 vs $4.99) and update cadence (every 2 months vs every 4 months). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Crystal Synth XT costs $4.99 and Electron ECHO mini piano $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Crystal Synth XT against 5.0 for Electron ECHO mini piano. Both are backed by a comparable volume of ratings — 20 and 11 respectively. Written reviews are what separate them: 78% of Crystal Synth XT's written reviews are positive against 93% of Electron ECHO mini piano's.

Crystal Synth XT ships an update every 4 months, Electron ECHO mini piano every 2 months. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Crystal Synth XT | Electron ECHO mini piano |
| --- | --- | --- |
| Price | $4.99 | **$1.99** |
| Rating | [4.9 (20 ratings)](https://appshunter.io/ios/app/crystal-synth-xt/id408288370/reviews) | **[5.0 (11 ratings)](https://appshunter.io/ios/app/electron-echo-mini-piano/id799573588/reviews)** |
| Number of ratings | **20** | 11 |
| Positive reviews | 78.4% of reviews | **93.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Paid | Paid |
| Size | 36 MB | 6 MB |
| Requires iOS | 11.0 | **7.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Green Oak Software](https://appshunter.io/developer/355342717) | [Emil Korngold](https://appshunter.io/developer/799573591) |

## 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


### Electron ECHO mini piano

[App page](https://appshunter.io/ios/app/electron-echo-mini-piano/id799573588)

Experience a simulated musical toy from the 1980s, complete with authentic synthesized sounds and optional battery depletion detuning. Learn classic and modern melodies with a free songbook and enjoy features like reverb and octave shifts.

**Highlights:** Simulated 1980s musical toy, Authentic synthesizer sound, Optional battery depletion detuning, Free songbook with melodies, Reverb effect, Octave down shift, Sub-oscillator for bass tones

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Crystal Synth XT free?

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

### Is Electron ECHO mini piano free?

Electron ECHO mini piano costs $1.99, with no in-app purchases.

### Which has better reviews, Crystal Synth XT or Electron ECHO mini piano?

Electron ECHO mini piano is rated higher. Crystal Synth XT averages 4.9 out of 5 from 20 ratings, while Electron ECHO mini piano averages 5.0 from 11 ratings.

### Do Crystal Synth XT or Electron ECHO mini piano have ads?

Neither Crystal Synth XT nor Electron ECHO mini piano shows ads.

### Which is updated more often, Crystal Synth XT or Electron ECHO mini piano?

Crystal Synth XT ships an update every 4 months, and Electron ECHO mini piano every 2 months. Most recently, Crystal Synth XT was updated on October 6, 2026 and Electron ECHO mini piano on October 10, 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.*