Esoteric Synth vs SlowMoFX
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Esoteric Synth
This app generates unique synthetic sound events using five oscillators with complex modulation. Control sound characteristics like duration and density for diverse audio textures, glitches, and drones.
- 5 oscillators
- Multiple Amplitude Modulation
- Multiple Frequency Modulation
- Duration and Density control
- AUv3 Audio Units Generator
- Audiobus 3 Generator
- Inter-App Audio Generator
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Esoteric Synth is a unusual generator of synthetic sound events. The synthesis is based on 5 oscillators which are intersected through an multiple amplitude modulation and multiple frequency modulation making an high sound variability The sound events can be controlled in two ways: EventMode (High Duration and Low Density) GrainMode (Low Duration and High Density) This App is suitable to generate complex sound textures, glitches,noises, sound clouds, sound drones, point sounds and more. Features: - AUv3 Audio Units Generator - Audiobus 3 Generator - Inter-App Audio Generator - 5 oscillators - Multiple Amplitude Modulation - Multiple Frequency Modulation - Amplitude Modulation Inverse - Frequency Modulation Inverse - Duration and Density control - Amplitude and Frequency General Control - Frequency Rescaling - Geometric and Harmonic Control - Geometric and Harmonic Control in Frequency Modulation - Randomic control on Amplitude and Frequency
SlowMoFX
This audio effect plugin allows users to seamlessly blend incoming audio with a slowed-down version, creating unique half-speed effects. It offers adjustable slowdown speeds, filtering, and built-in effects like delay and reverb for sound manipulation.
- Half-speed audio effect
- Adjustable slowdown speeds (1.5x, 2x, 4x)
- Low and high pass filters
- Built-in delay and reverb
- Ping Pong and Reverse modes
- MIDI automation support
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SlowMoFX is an AUv3 plugin that allows you to seemlessly mix incoming audio with a slowed down version in perfect sync with the current tempo. This allows you to obtain that sort after half speed effect that is used by many famous DJ's around the world. You can dropout the original audio completely to create dark downtempo atmospheric versions of a song and slowly and seemlessly return to the original mix. This is great for drums and percussive rythms. Lead instruments with sharp attacks when slowed down give those distinctive trap melodies and booming basses. Simply press the POWER button to turn on the effect. It will smoothly transition to a mix of the original and a slow halftime version. Selecting the 4x option will slow down to quad time making the mood even darker, while the 1.5x can be used to generate triplets and syncopated beats. The low and high pass filters can be used to determine how much of the input is effected, while the mix knob controls the depth of the effect. The Glide button enables a smooth glide from the none effected pitch to the destination pitch for those slow down and speed up type effects. A ping pong mode also allows you to alternate between forwards and reverse play while the reverse mode creates long soothing syncapated textures. SlowMoFX also sports a number of built in effects that can be enabled in order to create smooth transitions such as delay and reverb, while the EQ, drive, phaser, pan and pitch effects allow you to add flavour to the sound. If running under a DAW such as AUM that allows multiple output busses you can route the effected signal through your favourite external effects. Features: • Paramter and MIDI automation of main controls. • Filtering of input using LP / HP filters. • Built in EQ, Phaser, Pan, Delay, Reverb, Drive and Pitch effects. • Fade In/Out controls. • Ping Pong and Reverse modes. • Supports buffer sizes from 1-16 beats • 2x, 4x and 1.5x slow down supported. • External Effects loop in supported apps. • Includes comprehensive Help.
Screenshots
Verdict
The clearest difference is rating: Esoteric Synth at 4.8 against SlowMoFX's 3.7. Esoteric Synth also leads on price ($4.99 vs $9.99) and iOS requirement (10.0 vs 13). SlowMoFX's advantage is review sentiment (70% vs 60%). On ratings volume, update cadence, ads and in-app purchases 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
Esoteric Synth costs $4.99 and SlowMoFX $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Esoteric Synth holds the better App Store score, 4.8 against 3.7. Both are backed by a comparable volume of ratings — 18 and 13 respectively. Written reviews complicate that: 60% of Esoteric Synth's written reviews are positive against 70% of SlowMoFX's, so the app with the better star average is not the one people write more warmly about.
Esoteric Synth ships an update weekly, SlowMoFX every 6 days. The most recent releases landed on October 4, 2026 and October 16, 2026 respectively.
| Parameter | Esoteric Synth | SlowMoFX |
|---|---|---|
| Price | $4.99 — better | $9.99 |
| Rating | 4.8 (18 ratings) — better | 3.7 (13 ratings) |
| Positive reviews | 60.0% of reviews | 70.0% of reviews — better |
| Number of ratings | 18 — better | 13 |
| Update frequency | Weekly | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 13 |
| Further details — not scored | ||
| Size | 26 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | ANTHONY DI FURIA | 4Pockets.com |
Customer experience
Esoteric Synth
SlowMoFX
In-app purchases
Esoteric Synth
No in-app purchases
SlowMoFX
No in-app purchases

