# Crystal Synth XT vs Bumbly Synthesizer

The clearest difference is review sentiment: Crystal Synth XT at 78% against Bumbly Synthesizer's 0%. Crystal Synth XT also leads on rating (4.9 vs 3.0) and update cadence (every 4 months vs every 41 months). Bumbly Synthesizer's advantage is price ($3.99 vs $4.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

Crystal Synth XT costs $4.99 and Bumbly Synthesizer $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Crystal Synth XT holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: Crystal Synth XT has 22 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 78% of Crystal Synth XT's written reviews are positive against 0% of Bumbly Synthesizer's.

Crystal Synth XT ships an update every 4 months, Bumbly Synthesizer every 41 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Crystal Synth XT | Bumbly Synthesizer |
| --- | --- | --- |
| Price | $4.99 | **$3.99** |
| Rating | **[4.9 (22 ratings)](https://appshunter.io/ios/app/crystal-synth-xt/id408288370/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/bumbly-synthesizer/id1475454262/reviews) |
| Number of ratings | **22** | 1 |
| Positive reviews | **78.4% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 41 months |
| Monetization | Paid | Paid |
| Size | 36 MB | 105 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Green Oak Software](https://appshunter.io/developer/355342717) | [POGPALE Labs Inc.](https://appshunter.io/developer/1475454261) |

## 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


### Bumbly Synthesizer

[App page](https://appshunter.io/ios/app/bumbly-synthesizer/id1475454262)

Create unique sounds by drawing waveforms or using motion controls. This app offers a versatile synthesizer with customizable touch interfaces and a sequencer for composing music.

**Highlights:** Draw custom sound waves, Customizable touch interfaces (ribbon, piano, guitar), Sequencer for drawing music playback, Motion control for sound expression, Wingbeat-inspired sound generation, Adjustable synthesizer parameters

**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 Bumbly Synthesizer free?

Bumbly Synthesizer costs $3.99, with no in-app purchases.

### Which has better reviews, Crystal Synth XT or Bumbly Synthesizer?

Crystal Synth XT is rated higher. Crystal Synth XT averages 4.9 out of 5 from 22 ratings, while Bumbly Synthesizer averages 3.0 from 1 ratings.

### Do Crystal Synth XT or Bumbly Synthesizer have ads?

Neither Crystal Synth XT nor Bumbly Synthesizer shows ads.

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

Crystal Synth XT ships an update every 4 months, and Bumbly Synthesizer every 41 months. Most recently, Crystal Synth XT was updated on November 1, 2026 and Bumbly Synthesizer on November 3, 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.*