Comparison

Undulator vs EG ClassicFX AU3 Multi effects

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

Head to head
About

Undulator

This app offers a classic modulated tremolo effect inspired by a renowned hardware processor. It allows musicians to add rhythmic movement, ethereal feedback, and detuned echoes to various instruments and samples, creating evolving soundscapes and dynamic textures.

Highlights
  • Modulated tremolo effect
  • Ethereal feedback and detuned echoes
  • AM/FM modulation
  • Tempo sync
  • Real-time ribbon control
  • Multiple modulation waveforms
Read full description

Undulator is Eventide’s classic modulated tremolo effect from the iconic H3000 effects processor. This unique, rhythmic effect combines ethereal feedback and detuned echos, run through an AM / FM modulated tremolo. Whether used for manipulating samples or adding movement to strings, pads, guitars, and keys, Undulator is a muse for creative musicians. Add Undulator into your plug-ins collection for the most playable tremolo-style effect on your DAW or iOS device. Undulator excels at evolving pads, sync’d chops, and time-lapsing dreamy soundscapes. Combined with a multi-tap delay and powerful tremolo, Undulator’s controls give any sound sustain and shape. This is perfect for transforming ordinary synths, keys, guitars, and even vocals into evolving pads, tempo synced production elements, or ethereal and fluctuant delays. Simply put, Undulator can make shorter sounds into longer layered effects, and give sustaining sounds shape and rhythmic character. Use the Ribbon to morph tremolo patterns into vacillating and varying rhythmic territories. This can be effective for calling attention to synth pads and creating a state of flux or rarity which is otherwise arduous to achieve. - Turn up the MIX to increase the dry/effect ratio. - Utilize multiple modulation waveform shapes and sources to alter the rhythmic feel. - Subtly finesse detuning of delays by using SPREAD. - Add FEEDBACK to accentuate delays or create infinite loops. - The Secondary LFO determines how fast the depth and speed modulation “wiggle” their targets. - Lock the tremolo to tempo using SYNC. - RETRIG at the top of the waveform for a more predictable effect. - RIBBON lets you ‘play’ the effect in real-time and provides dynamic and fluid control to morph back and forth between the settings of your choice. - SLOW/FAST button toggles on a “Slow LFO” mode. Holding it down to “BRAKE” temporarily slows down the LFOs at a constant rate until released. - Update the tremolo speed in real time using the TAP button. - Available as an AUv3 plug-in and Standalone App.

About

EG ClassicFX AU3 Multi effects

This audio effects app provides a suite of classic effects like reverb, delay, and chorus for music production. It allows for deep customization of each effect and offers advanced features like AU3 multi-output and MIDI CC automation. It requires a compatible host app to function.

Highlights
  • 8 classic audio effects
  • Tweakable effects with bypass
  • AU3 multi-output support
  • MIDI CC automation
  • Multitouch effect modulation
  • Live mode for on-the-fly effects
  • Reorderable effect chain
  • Preset saving
Features
Read full description

sEGments FX is a simple, fast and fun to use way to add multieffects to your audio tracks. Features: - 8 classic effects - Reverb, Delay, Flanger, Filter, Auto-Wah, Phaser, Chorus, Tremolo - each effect is tweakable and can be bypassed (double tap on the mix slider) - AU3 multi-output - send each effect to a different output bus - Each parameter can be automated via MIDI cc in your favorite daw - Multitouch effect view to modulate effects to temporary state - Live mode to apply effects on the fly and bypass them on release - Effect chain can be re ordered - Presets saving PLEASE NOTE: This is not a standalone app, but you need an AU3 compatible host like n-Track, AUM, Auria, Cubasis or Beatmaker3

Screenshots

Undulator3 screens
EG ClassicFX AU3 Multi effects3 screens

Verdict

The call

The clearest difference is update cadence: EG ClassicFX AU3 Multi effects at every 3 days against Undulator's every 2 months. EG ClassicFX AU3 Multi effects also leads on rating (4.7 vs 4.3) and price ($3.99 vs $7.99). On review sentiment, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Undulator costs $7.99 and EG ClassicFX AU3 Multi effects $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

EG ClassicFX AU3 Multi effects holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 12 and 6 respectively. Written reviews complicate that: 86% of Undulator's written reviews are positive against 80% of EG ClassicFX AU3 Multi effects's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Undulator ships an update every 2 months, EG ClassicFX AU3 Multi effects every 3 days. Both last shipped on November 3, 2026.

Scorecard4 real differences · 6 level
Undulator versus EG ClassicFX AU3 Multi effects: the parameters behind the verdict, then further details
ParameterUndulatorEG ClassicFX AU3 Multi effects
Price$7.99$3.99 — better
Rating4.3 (12 ratings)4.7 (6 ratings) — better
Positive reviews85.7% of reviews — better80.0% of reviews
Number of ratings12 — better6
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.08.0 — better
Further details — not scored
Size16 MB30 MB
Age rating4+4+
DeveloperEventideElliott Garage

Customer experience

Undulator

All ratings11 ratings
Positive81.8%
Neutral0.0%
Negative18.2%
Written reviews7 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

EG ClassicFX AU3 Multi effects

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews5 reviews
Positive80.0%
Neutral20.0%
Negative0.0%

In-app purchases

None

Undulator

No in-app purchases

None

EG ClassicFX AU3 Multi effects

No in-app purchases

Questions

Is Undulator free?
Undulator costs $7.99, with no in-app purchases.
Is EG ClassicFX AU3 Multi effects free?
EG ClassicFX AU3 Multi effects costs $3.99, with no in-app purchases.
Which has better reviews, Undulator or EG ClassicFX AU3 Multi effects?
EG ClassicFX AU3 Multi effects is rated higher. Undulator averages 4.3 out of 5 from 12 ratings, while EG ClassicFX AU3 Multi effects averages 4.7 from 6 ratings.
Do Undulator or EG ClassicFX AU3 Multi effects have ads?
Neither Undulator nor EG ClassicFX AU3 Multi effects shows ads.
Which is updated more often, Undulator or EG ClassicFX AU3 Multi effects?
Undulator ships an update every 2 months, and EG ClassicFX AU3 Multi effects every 3 days. Most recently, Undulator was updated on November 3, 2026 and EG ClassicFX AU3 Multi effects on November 3, 2026.

Other comparisons