Comparison

EG WaveSHAPER vs GSDSP Quantum Filter

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

Head to head
About

EG WaveSHAPER

Create unique sounds by drawing waveforms or shaping built-in ones. Blend them with analog and sub oscillators, and automate parameters with drawable LFOs and envelopes. Explore a hybrid waveshaping and wavetable engine for complex sonic textures.

Highlights
  • Hybrid Wavetable/Waveshaping engine
  • Draw custom wavetables
  • Assignable LFOs and Envelopes
  • Built-in Reverb, Delay, and EG Crush FX
  • Core MIDI support
  • AUv3 plugin compatibility
Features
Read full description

EG WaveSHAPER is the first synthesizer that lets you create your sound with a finger. Draw the waveform on the screen or shape a builtin one, mix it with a classic analog oscillator and a sub oscillator and automate all the knobs with 2 drawable LFOs and 2 ENVs HYBRID WAVESHAPING ENGINE 'Waveshaping is a synthesis-and-transformation technique that turns simple sounds into complex sounds' 2 wavetables can be designed and morphed to create unique and dynamic sounds under your finger, choosing the morph attack and release; complex spectra can be created waveshaping the oscillator and introducing non linear distortion, rich harmonics and a tube-vacuum behaviour. The hybrid Waveshaping/Wavetable engine lets you combine a wavetable oscillator with a classic oscillator and a sub oscillator, to add additional sound layers and depth. LFOs & ENVs 2 Lfo and 2 Envelopes with indipendent time can be assigned to virtually any of the synth parameters. They can also be graphically designed with the touch of your finger or you can choose among the builtin envelopes. OTHER FEATURES - Hybrid Wavetable/Waveshaping engine - Draw your wavetable oscillator with your finger - 100+ presets (Pad, Lead, Bass and Fx) - 30+ builtin waveforms to use and modify - 2 LFOs and 2 ENVs assignable to any parameter - FX: Reverb, Delay and EG Crush - Detune osc to create huge unison sounds - FM and Noise with configurble FM Ratio and Noise eq - VCF and Reso filters - Complete presets management with export and share - Core MIDI: MIDI in, MIDI CC, MIDI channel pressure control - AU3 with full knobs parameters automation - Universal for iPad & iPhone

About

GSDSP Quantum Filter

This audio effect plugin offers analog-modeled filters with flexible routing and dynamic modulation for creative sound design. It provides extensive control over tone shaping and complex filtering with various filter types and configurations.

Highlights
  • Analog-modelled filters
  • 11 filter modes
  • Series and parallel routing
  • Dynamic modulation support
  • Stereo and dual mono modes
  • MIDI control integration
Features
Read full description

Analog warmth meets flexible routing and dynamic modulation in a filter workstation built for creative sound design. Analog-Modelled Filters Quantum Filter uses resonant, analog-modelled filter designs that behave smoothly and musically across the entire spectrum. With no cramping, stepping, or digital artefacts, the filters remain stable even under rapid modulation. At high resonance settings they can reach self-oscillation, similar to classic hardware circuits. Filter Types & Routing Choose from 11 filter modes, including Lowpass, Highpass, Bandpass, Notch, Shelving options, Bell, and Ladder Lowpass in 1–4 pole configurations. Combine filters in series (up to three stages) or parallel (up to two), resulting in over 2,000 possible routing combinations for detailed tone shaping and complex layered filtering. Built for Modulation Designed to handle fast, artefact-free modulation, Quantum Filter responds cleanly even under rapid parameter changes. Its stability makes it suitable for dynamic environments, rhythmic modulation, or complex movement across multiple filter stages. Stereo and Dual Mono Switch between stereo and dual mono modes to shape the stereo image. In dual mono mode, left and right channels can move independently, enabling asymmetric movement, wider imaging, or separate modulation paths for each side. MIDI Control Quantum Filter integrates ADSR & AR modulators that respond directly to MIDI, allowing envelope-driven filter motion that behaves like a synthesizer’s filter section. This integration adds expressive control for rhythmic gating, animated sweeps, and dynamic shaping based on your playing or sequencing. Quantum Filter 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

EG WaveSHAPER3 screens
GSDSP Quantum Filter3 screens

Verdict

The call

The clearest difference is price: EG WaveSHAPER at $8.99 against GSDSP Quantum Filter's $14.99. EG WaveSHAPER also leads on update cadence (fortnightly vs every 5 weeks) and ratings volume (23 vs 3). GSDSP Quantum Filter's advantage is review sentiment (100% vs 85%) and rating (5.0 vs 4.8). On ads, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

EG WaveSHAPER costs $8.99 and GSDSP Quantum Filter $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 Filter holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: EG WaveSHAPER has 23 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 85% of EG WaveSHAPER's written reviews are positive against 100% of GSDSP Quantum Filter's.

UpkeepUpdate frequency

EG WaveSHAPER ships an update fortnightly, GSDSP Quantum Filter every 5 weeks. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

Scorecard6 real differences · 4 level
EG WaveSHAPER versus GSDSP Quantum Filter: the parameters behind the verdict, then further details
ParameterEG WaveSHAPERGSDSP Quantum Filter
Price$8.99 — better$14.99
Rating4.8 (23 ratings)5.0 (3 ratings) — better
Positive reviews84.6% of reviews100.0% of reviews — better
Number of ratings23 — better3
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.1 — better12.0
Further details — not scored
Size25 MB77 MB
Age rating4+4+
DeveloperElliott GarageGustav Scholda

Customer experience

EG WaveSHAPER

All ratings23 ratings
Positive95.7%
Neutral4.3%
Negative0.0%
Written reviews13 reviews
Positive84.6%
Neutral15.4%
Negative0.0%

GSDSP Quantum Filter

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EG WaveSHAPER

No in-app purchases

None

GSDSP Quantum Filter

No in-app purchases

Questions

Is EG WaveSHAPER free?
EG WaveSHAPER costs $8.99, with no in-app purchases.
Is GSDSP Quantum Filter free?
GSDSP Quantum Filter costs $14.99, with no in-app purchases.
Which has better reviews, EG WaveSHAPER or GSDSP Quantum Filter?
GSDSP Quantum Filter is rated higher. EG WaveSHAPER averages 4.8 out of 5 from 23 ratings, while GSDSP Quantum Filter averages 5.0 from 3 ratings.
Do EG WaveSHAPER or GSDSP Quantum Filter have ads?
Neither EG WaveSHAPER nor GSDSP Quantum Filter shows ads.
Which is updated more often, EG WaveSHAPER or GSDSP Quantum Filter?
EG WaveSHAPER ships an update fortnightly, and GSDSP Quantum Filter every 5 weeks. Most recently, EG WaveSHAPER was updated on September 21, 2026 and GSDSP Quantum Filter on September 22, 2026.

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