# Deep Synth vs Zeeon synth

The clearest difference is price: Deep Synth at $4.99 against Zeeon synth's $14.99. Deep Synth also leads on in-app purchases (none vs 3) and iOS requirement (10.0 vs 15.6). Zeeon synth's advantage is rating (4.8 vs 4.0) and review sentiment (76% vs 50%). On update cadence, ads and device support there is nothing between them.

Deep Synth costs $4.99 and Zeeon synth $14.99 up front. Zeeon synth sells 3 one-off in-app purchases. Deep Synth asks for nothing beyond the download.

Zeeon synth holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Zeeon synth has 209 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of Deep Synth's written reviews are positive against 76% of Zeeon synth's.

Deep Synth ships an update monthly, Zeeon synth every 2 months. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Deep Synth | Zeeon synth |
| --- | --- | --- |
| Price | **$4.99** | $14.99 |
| Rating | [4.0 (2 ratings)](https://appshunter.io/ios/app/deep-synth-fm-synthesizer/id1203273984/reviews) | **[4.8 (209 ratings)](https://appshunter.io/ios/app/zeeon-synth/id1230960440/reviews)** |
| Number of ratings | 2 | **209** |
| Positive reviews | 50.0% of reviews | **76.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 9 MB | 27 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) | [BeepStreet](https://appshunter.io/developer/321412321) |

## What reviewers say

### Deep Synth

[App page](https://appshunter.io/ios/app/deep-synth-fm-synthesizer/id1203273984)

Create unique sounds with this FM synthesizer app. It features real-time wave manipulation, multiple sound effects, and MIDI keyboard support. Explore dynamic sound design with its intuitive interface.

**Highlights:** Real-time wave form editing, Simple envelope filter, Reverb and tremolo effects, Polyphonic keyboard with 5 octaves, MIDI keyboard support, AUV3 Audio Unit instrument

**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 Deep Synth free?

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

### Is Zeeon synth free?

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

### Which has better reviews, Deep Synth or Zeeon synth?

Zeeon synth is rated higher. Deep Synth averages 4.0 out of 5 from 2 ratings, while Zeeon synth averages 4.8 from 209 ratings.

### Do Deep Synth or Zeeon synth have ads?

Neither Deep Synth nor Zeeon synth shows ads.

### Which is updated more often, Deep Synth or Zeeon synth?

Deep Synth ships an update monthly, and Zeeon synth every 2 months. Most recently, Deep Synth was updated on November 2, 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.*