# LH Rubbing vs Zeeon synth

The clearest difference is price: LH Rubbing at Free against Zeeon synth's $14.99. LH Rubbing also leads on in-app purchases (none vs 3) and iOS requirement (9.3 vs 15.6). Zeeon synth's advantage is rating (4.8 vs 4.2) and update cadence (every 2 months vs every 26 months). On review sentiment and ads there is nothing between them.

LH Rubbing is free to download; Zeeon synth costs $14.99 up front. Zeeon synth sells 3 one-off in-app purchases. LH Rubbing asks for nothing beyond the download.

Zeeon synth holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Zeeon synth has 209 ratings behind it against 19, so its average is the more settled of the two. Written reviews split almost evenly too, at 77% and 76% positive.

LH Rubbing ships an update every 26 months, Zeeon synth every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | LH Rubbing | Zeeon synth |
| --- | --- | --- |
| Price | **Free** | $14.99 |
| Rating | [4.2 (19 ratings)](https://appshunter.io/ios/app/lh-rubbing/id652348001/reviews) | **[4.8 (209 ratings)](https://appshunter.io/ios/app/zeeon-synth/id1230960440/reviews)** |
| Number of ratings | 19 | **209** |
| Positive reviews | **76.9% of reviews** | 76.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 27 MB |
| Requires iOS | **9.3** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [昊 刘](https://appshunter.io/developer/652348004) | [BeepStreet](https://appshunter.io/developer/321412321) |

## What reviewers say

### LH Rubbing

[App page](https://appshunter.io/ios/app/lh-rubbing/id652348001)

This virtual analog synthesizer app for iPad offers a rich, analog sound. It features multiple oscillators, filters, and LFOs for extensive sound shaping. Control pitch, cutoff, and resonance with an ADSR envelope and add vibrato with keyboard interaction.

**Highlights:** Polyphony synthesizer, Three wave oscillators, One noise oscillator, Two LFOs, Three type embedded filter, ADSR envelope generator, Keyboard vibrato control

**Features:** macOS Compatibility

**In-app purchases:** none


### Zeeon synth

[App page](https://appshunter.io/ios/app/zeeon-synth/id1230960440)

This app is a virtual analog synthesizer that recreates the sound and feel of classic hardware. It features a detailed circuit-modeling engine, powerful modulation, and multiple filter models for rich, organic soundscapes. Explore a vast array of presets and expand your sonic palette with additional sound banks.

**Highlights:** Circuit-modeling engine, Powerful modulation matrix, Dual oscillators with variable waveforms, Multiple filter models, Built-in effects unit, Audio Unit v3 support, Polyphonic step sequencer

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OI - Exploration Vol. 1 | $3.99 | one-time |
| BB Z-Space | $4.99 | one-time |
| BB Synthwave | $4.99 | one-time |

**What reviewers like**

- 🎨 Excellent sound quality
- 🎹 Intuitive and well-designed interface
- 🔧 Flexible and deep sound design capabilities
- 💻 Seamless integration as an AUv3 plugin
- 🎚️ Smooth and responsive controls

**What reviewers complain about**

- 🐛 Stability issues, crashes on some devices
- 🔌 Compatibility problems with newer iOS versions
- 📂 Preset management could be improved
- 🔀 Lack of MIDI learn and sequencer features
- 🖥️ UI scaling issues on larger iPad displays

**Reported bugs**

- Preset settings not retained after app restart
- Synth reverts to default settings when reopening Logic Pro project
- Crashes and freezes on certain iOS 14+ devices
- Inability to access in-app purchases from within the app

**Requested features**

- Add MIDI learn functionality
- Implement a more robust preset management system
- Include a built-in sequencer with save/load capabilities
- Improve UI scaling and layout for larger iPad screens
- Provide better integration with inter-app audio and Audiobus


## Frequently asked questions

### Is LH Rubbing free?

LH Rubbing is free to download, with no in-app purchases.

### Is Zeeon synth free?

Zeeon synth costs $14.99, and also offers in-app purchases.

### Which has better reviews, LH Rubbing or Zeeon synth?

Zeeon synth is rated higher. LH Rubbing averages 4.2 out of 5 from 19 ratings, while Zeeon synth averages 4.8 from 209 ratings.

### Do LH Rubbing or Zeeon synth have ads?

Neither LH Rubbing nor Zeeon synth shows ads.

### Which is updated more often, LH Rubbing or Zeeon synth?

LH Rubbing ships an update every 26 months, and Zeeon synth every 2 months. Most recently, LH Rubbing was updated on November 1, 2026 and Zeeon synth on November 6, 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.*