# Crystal Synth XT vs luapsel

The clearest difference is update cadence: luapsel at every 6 days against Crystal Synth XT's every 4 months. luapsel also leads on price ($0.99 vs $4.99) and chart position (#189 vs unranked). Crystal Synth XT's advantage is rating (4.9 vs 4.5) and ratings volume (20 vs 4). On ads, in-app purchases, monetization model and device support there is nothing between them.

Crystal Synth XT costs $4.99 and luapsel $0.99 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 4.5. That said, the two scores are not equally well evidenced: Crystal Synth XT has 20 ratings behind it against 4, so its average is the more settled of the two.

Crystal Synth XT ships an update every 4 months, luapsel every 6 days. The most recent releases landed on September 21, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Crystal Synth XT | luapsel |
| --- | --- | --- |
| Price | $4.99 | **$0.99** |
| Rating | **[4.9 (20 ratings)](https://appshunter.io/ios/app/crystal-synth-xt/id408288370/reviews)** | [4.5 (4 ratings)](https://appshunter.io/ios/app/luapsel/id6569224196/reviews) |
| Number of ratings | **20** | 4 |
| Positive reviews | 78.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#189** |
| Size | 36 MB | 101 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Green Oak Software](https://appshunter.io/developer/355342717) | [OSC Audio](https://appshunter.io/developer/1693533681) |

## 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


### luapsel

[App page](https://appshunter.io/ios/app/luapsel/id6569224196)

**Currently charting:** #189 Top Paid · Music (US App Store)

Create calming electric guitar ambience with reversed samples and built-in effects. Offers polyphonic playback, multiple articulations, and real-time sound shaping tools for unique musical textures.

**Highlights:** Polyphonic reversed guitar sounds, Round Robin sampling, Multiple articulations, Built-in delay, reverb, chorus, Real-time low-pass filter, ADSR Release control, Standalone samples available

**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 luapsel free?

luapsel costs $0.99, with no in-app purchases.

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

Crystal Synth XT is rated higher. Crystal Synth XT averages 4.9 out of 5 from 20 ratings, while luapsel averages 4.5 from 4 ratings.

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

Neither Crystal Synth XT nor luapsel shows ads.

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

Crystal Synth XT ships an update every 4 months, and luapsel every 6 days. Most recently, Crystal Synth XT was updated on September 21, 2026 and luapsel on September 7, 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.*