Comparison

NLogSynth PRO vs GSDSP Quantum Distortion

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

NLogSynth PRO

This app is a professional virtual analog synthesizer for iOS, offering a low-latency sound engine with extensive editing capabilities. It supports various inter-app audio and MIDI protocols, allowing for integration with DAWs and external controllers. Create and export custom sounds and recordings with studio-quality audio.

Highlights
  • Virtual analog low-latency sound engine
  • Extensive sound editing with over 150 parameters
  • Support for AudioUnit v3, AudioBus 3, Inter-App Audio
  • Full MIDI implementation and Core MIDI compatibility
  • Studio quality 44.1 kHz Stereo CD quality audio
  • 224 factory sounds and user banks
  • Multi-effect section with delay, chorus, reverb, and more
Features
Read full description

Professional Virtual Analogue Synthesizer supporting AudioUnit v3, AudioBus 3, Inter-App Audio and Core MIDI compatible apps & interfaces. Versatile iOS synth with professional grade virtual analogue low latency sound engine: - Play it from on-screen keyboard - Use MIDI keyboards & controllers via MIDI interfaces - Connect to your digital audio workstation via MIDI interfaces - Play NLogSynth from other iOS apps using virtual Core MIDI - Synchronize NLog via MIDI Clock to other apps or devices - Make audio or MIDI recordings on the run and share your files - Export patches & recordings Supports external MIDI input and output via CoreMIDI compatible interfaces and class compliant USB MIDI interfaces. Full MIDI implementation including velocity control, pitch bend, sustain pedal, modulation wheel, program & bank change, polyphonic after touch, channel pressure and assignable midi controller & MIDI Sync receiving mode. ::: Follow @nlogmusic at Twitter! ::: ::: Featured in How to Make a Noise: iPad Synthesizers Edition (http://noisesculpture.com/ipad) the most widely read synthesizer book ::: - 224 IMPRESSIVE FACTORY SOUNDS  - including fresh new sound set by the producer 7 Skies - ENDLESS options for SOUND EDITING     - Over 150 parameters     - 3 user banks with 96 slots   - STUDIO QUALITY sounds     - Professional 44.1 kHz Stereo CD quality     - 32bit floating point engine     - Highly efficient algorithms - STAGE safe KEYBOARD implementation     - SLIDING & LOCK option     - Double manual option     - POLY, MONO & LEGATO modes     - Velocity control     - Different key sizes - Fully customizable EXPRESSION CONTROL     - Realistic PITCH BEND and MOD WHEEL implementation     - X/Y dimensional controller     - 4 customizable PERFORMANCE knobs     - Keyboard with VERTICAL modulation control - Incredible FAT & RICH:     - New filter implementation for SMOOTH and JUICY control with 7 FILTER types     - UNISONO mode for up to 4 parallel sounds with detune, delay and panning control === SOUND editing features === - 4 Oscillators with 20 waveforms:     - classic analogue SIN, SAWTOOTH, TRIANGLE and SQUARE     - 16 additional carefully designed wavetables  - True PWM pulse-width modulation - Frequency mod - Ring mod - Noise generator - 2 Filter with 7 filter types     - Low, High & Band Passes     - Finest sweeps & smoothest cutoff tuning     - Carefully resonating     - 12 & 24dB option for steepness - 4 ADSR Envelope generators     - Velocity controlled attack time - Slope control - 4 Modulation LFOs     - Sample & hold     - Fade in delay - Modulation Matrix - 4 Modulation slots each modulating 3 destinations - Multi-effect section     - Stereo delay with x-feed & filter     - chorus - flanger - phaser     - distortion - reverb - parametric EQ

About

GSDSP Quantum Distortion

Explore four distinct distortion effects—Saturation, BitCrush, Ring Modulation, and Downsampling—blended and controlled via an intuitive XY pad. Shape harmonics, reduce digital resolution, introduce inharmonic motion, and create classic digital degradation for unique audio textures.

Highlights
  • Four distortion algorithms (Saturation, BitCrush, Ring Modulation, Downsampling)
  • Intuitive XY pad for blending effects
  • Custom waveshaping saturation
  • BitWarp for tonal variation
  • Tunable oscillator for ring modulation
  • Adjustable downsampling rate and jitter
  • AUv3 audio effect plugin
Features
Read full description

Four complementary distortion algorithms — Saturation, BitCrush, Ring Modulation, and Downsampling — blended and shaped through an intuitive XY pad. Saturation Shape harmonics using Quantum Distortion’s custom waveshaping saturation. Adjust Drive to set the intensity from subtle warmth to strong coloration, and use Asymmetry to introduce controlled even-harmonic emphasis of vintage tube characteristics. BitCrush Reduce digital resolution using BitCrush and reshape the crushed signal with BitWarp, which bends the quantization curve for additional tonal variation. This combination allows precise control over both the amount of reduction and the character of the resulting digital artifacts. Ring Modulation Introduce inharmonic motion using ring modulation, generated by multiplying the input with a tunable oscillator. Adjust frequency and amount in real time to create anything from light metallic shading to dense, shifting sidebands. Downsampling Lower the sample rate using Downsampling, reducing temporal resolution for classic digital degradation effects. Set the rate down to 200 Hz or introduce Jitter for controlled randomness, adding instability and movement to the downsampled signal. XY Pad Blending Navigate between the four distortion algorithms using the XY pad, allowing smooth transitions or static blends across the processing modes. The background updates to reflect the current region, providing clear visual feedback while exploring hybrid distortion shapes and interactions. Quantum Distortion is an AUv3 audio effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more. A Desktop version is also available for Windows and macOS (VST3 / AU / AAX). More information here: https://gs-dsp.com/products

Screenshots

GSDSP Quantum Distortion3 screens

Verdict

The call

The clearest difference is rating: GSDSP Quantum Distortion at 5.0 against NLogSynth PRO's 4.6. GSDSP Quantum Distortion also leads on review sentiment (100% vs 83%) and update cadence (every 5 weeks vs every 2 months). NLogSynth PRO's advantage is price ($8.99 vs $14.99) and ratings volume (33 vs 10). On ads, in-app purchases, monetization model and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

NLogSynth PRO costs $8.99 and GSDSP Quantum Distortion $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

GSDSP Quantum Distortion holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 33 and 10 respectively. Written reviews point the same way: 83% of NLogSynth PRO's written reviews are positive against 100% of GSDSP Quantum Distortion's.

UpkeepUpdate frequency

NLogSynth PRO ships an update every 2 months, GSDSP Quantum Distortion every 5 weeks. The most recent releases landed on October 1, 2026 and September 22, 2026 respectively.

Scorecard6 real differences · 4 level
NLogSynth PRO versus GSDSP Quantum Distortion: the parameters behind the verdict, then further details
ParameterNLogSynth PROGSDSP Quantum Distortion
Price$8.99 — better$14.99
Rating4.6 (33 ratings)5.0 (10 ratings) — better
Positive reviews83.1% of reviews100.0% of reviews — better
Number of ratings33 — better10
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS13.012.0 — better
Further details — not scored
Size25 MB80 MB
Age rating4+4+
Developertempo rubatoGustav Scholda

Customer experience

NLogSynth PRO

All ratings32 ratings
Positive87.5%
Neutral3.1%
Negative9.4%
Written reviews166 reviews
Positive83.1%
Neutral7.8%
Negative9.0%

GSDSP Quantum Distortion

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

NLogSynth PRO

No in-app purchases

None

GSDSP Quantum Distortion

No in-app purchases

Questions

Is NLogSynth PRO free?
NLogSynth PRO costs $8.99, with no in-app purchases.
Is GSDSP Quantum Distortion free?
GSDSP Quantum Distortion costs $14.99, with no in-app purchases.
Which has better reviews, NLogSynth PRO or GSDSP Quantum Distortion?
GSDSP Quantum Distortion is rated higher. NLogSynth PRO averages 4.6 out of 5 from 33 ratings, while GSDSP Quantum Distortion averages 5.0 from 10 ratings.
Do NLogSynth PRO or GSDSP Quantum Distortion have ads?
Neither NLogSynth PRO nor GSDSP Quantum Distortion shows ads.
Which is updated more often, NLogSynth PRO or GSDSP Quantum Distortion?
NLogSynth PRO ships an update every 2 months, and GSDSP Quantum Distortion every 5 weeks. Most recently, NLogSynth PRO was updated on October 1, 2026 and GSDSP Quantum Distortion on September 22, 2026.

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