Deep Synth vs Zeeon synth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Deep Synth
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.
- Real-time wave form editing
- Simple envelope filter
- Reverb and tremolo effects
- Polyphonic keyboard with 5 octaves
- MIDI keyboard support
- AUV3 Audio Unit instrument
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Unique synth with AUV3 (Audio Unit) and midi keyboard support! You can touch and change the wave and hear the difference. Deep Synth also has: - simple envelope filter - reverb effect - tremolo sound effect - hair - high frequency modulation. - 5 points wave form modulation - polyphonic keyboard - 5 octaves range selector - point vibe to make your wave dynamic - build-in resonator effect - supports MIDI keyboards via USB (full velocity and pitch shift support) - works as Audio Unit instrument plug-in AUV3 The sound generator inside the synthesizer is producing the exact wave form as the one you have created. You can control the position and width of the picks in real time. The synth app has fast and capable piano keyboard. It is fully polyphonic and you can play in 5 octaves.
Zeeon synth
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.
- 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
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Zeeon is a virtual-analog synthesizer built on a deeply detailed circuit-modeling engine. We’ve studied classic and modern analog synths to uncover what gives them their unmistakable character and recreated that essence with precision. The result is a unique instrument that delivers the warmth, movement, and organic depth of true hardware. While many emulations sound flat, Zeeon breathes. Every note is alive, with tight lows and shimmering highs. All audio and modulation are processed at 176 kHz (4× oversampling) for uncompromised quality across the entire spectrum. “Desktop-class sound engine … fidelity of this analog emulation goes beyond everything else on iOS.” – App Store review Features • Audio Unit v3 and standalone application with a simple polyphonic step sequencer • Powerful modulation matrix offering self-modulation and cross-layer modulation, 8 modulation slots, 17 signal sources and 41 targets available, both from modulation modules and audio signal path. This takes Zeeon into semi-modular territory. Imagine oscillator waveform, panning, filter cutoff, resonance or LP-HP mode modulated by oscillators or another layer! • 2 oscillators with continuously variable waveforms, hard-sync and sub-oscillator. Carefully simulated analog drift and PSU influence. • Filter: 3 models available: Transistor ladder low pass, OTA cascade low pass and State Variable Filter with continuously variable LP-HP + BP mode. • 2 low frequency oscillators and envelope generators per voice. • Overdrive: diode clipper, transistor saturation, wave folder, pre and post filter. • Up to 2 layers per voice. Layers can modulate each other. • Effects unit: Circuit modelled BBD chorus, bass booster, zero-delay Phaser, Stereo delay and Reverb. • 280 presets and Tutorials bank. 3 additional banks available as IAPs. Full manual and audio demos available at the BeepStreet website.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Deep Synth | Zeeon synth |
|---|---|---|
| Price | $4.99 — better | $14.99 |
| Rating | 4.0 (2 ratings) | 4.8 (209 ratings) — better |
| Positive reviews | 50.0% of reviews | 76.0% of reviews — better |
| Number of ratings | 2 | 209 — better |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 9 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Aleksandar Mlazev | BeepStreet |
Customer experience
Deep Synth
Zeeon synth
Bugs and requests
Deep Synth
Not enough reviews yet to summarise bugs or requests.
Zeeon synth
Reported bugs
4 issues- 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
5 requests- 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
In-app purchases
Deep Synth
No in-app purchases
Zeeon synth
- OI - Exploration Vol. 1$3.99
- BB Z-Space$4.99
- BB Synthwave$4.99









