Comparison

SynthScaper LE vs Undulator

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

Head to head
About

SynthScaper LE

Create lush pads, psychedelic synths, and atmospheric soundscapes with a powerful, easy-to-use sound engine. Design unique multi-timbral scenes with three independent generators, a spatial mixer, and a versatile screen keyboard. Supports MIDI controllers and works standalone or with DAWs.

Highlights
  • Multitimbral sound engine
  • Three independent sound generators
  • Spatial mixer with reverb simulation
  • Advanced screen keyboard with continuous tone control
  • Sequencer/arpeggiator per generator
  • Full MIDI keyboard and controller support
  • AUv3 and Inter-App audio compatible
Features
Read full description

Lush pads, psychedelic synths and atmospheric soundscapes in an easy to use app with a powerful sound engine. SynthScaper LE has three independent sound generators in which you can use various presets from the large built-in library and create unique multi-timbral sound scenes. You can tune the general parameters that define the character of the sound of each generator and place them in a common sound space with the spatial mixer. The spatial mixer simulates two types of reverberating space in which you define the distance and position from the sound generator to the listener, the dimension of the space and amount of reflections. Use the "Random" option to get new ideas for your unique sound scenes. This option generates a new scene from existing presets and sets the generators' parameters to random values. Next you can adjust them to polish your special sound. The screen keyboard in addition to standard use has a special mode that turns it into a continuous area in which you can smoothly change the tone separately for each touch. This is ideal for creating a variety of soundscapes, drones and textures. The screen keyboard also has a simulation of velocity, adjustment of pitch and the rate of modulation, as well as a scale editor with a built-in list of scales. Each sound generator has its own sequencer / arpeggiator, so you can create a common sequence for all generators or separate sequences for each. Many different modes allow you to turn even the simplest sequence into a continuously varying melody changing just by pressing a single note. You can also record a sequence from the keyboard or copy it from other scenes. SynthScaper LE fully supports MIDI keyboards and controllers and can assign external MIDI controls to almost all parameters. You can assign sound generators to different ranges on your MIDI- and on-screen keyboard, and even only to MIDI or only to the screen keyboard. In addition, this app can auto detect the type of MIDI keyboard and automatically use extended controls such as knobs and buttons. For a list of supported MIDI keyboards and assigned controls see the app description. This app can work as standalone and can be used with any audio host or DAW apps that support AUv3 or Inter-App audio connection. SynthScaper LE is completely compatible with the full-featured advanced version SynthScaper and can import scenes packs created in the advanced version. Video demo: https://youtu.be/CNwVbW26s5o You can find more details about SynthScaper LE on the website: https://motion-soundscape.blogspot.com

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.

Screenshots

SynthScaper LE4 screens
Undulator3 screens

Verdict

The call

The clearest difference is rating: SynthScaper LE at 4.7 against Undulator's 4.3. SynthScaper LE also leads on update cadence (every 3 weeks vs every 2 months) and price ($4.99 vs $7.99). Undulator's advantage is review sentiment (86% vs 73%). On ratings volume, ads, in-app purchases and monetization model 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

SynthScaper LE costs $4.99 and Undulator $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SynthScaper LE holds the better App Store score, 4.7 against 4.3. Both are backed by a comparable volume of ratings — 24 and 11 respectively. Written reviews complicate that: 73% of SynthScaper LE's written reviews are positive against 86% of Undulator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

SynthScaper LE ships an update every 3 weeks, Undulator every 2 months. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

Scorecard4 real differences · 6 level
SynthScaper LE versus Undulator: the parameters behind the verdict, then further details
ParameterSynthScaper LEUndulator
Price$4.99 — better$7.99
Rating4.7 (24 ratings) — better4.3 (11 ratings)
Positive reviews72.7% of reviews85.7% of reviews — better
Number of ratings24 — better11
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.011.0
Further details — not scored
Size94 MB16 MB
Age rating4+4+
DeveloperIgor VasilievEventide

Customer experience

SynthScaper LE

All ratings24 ratings
Positive91.7%
Neutral8.3%
Negative0.0%
Written reviews11 reviews
Positive72.7%
Neutral9.1%
Negative18.2%

Undulator

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

In-app purchases

None

SynthScaper LE

No in-app purchases

None

Undulator

No in-app purchases

Questions

Is SynthScaper LE free?
SynthScaper LE costs $4.99, with no in-app purchases.
Is Undulator free?
Undulator costs $7.99, with no in-app purchases.
Which has better reviews, SynthScaper LE or Undulator?
SynthScaper LE is rated higher. SynthScaper LE averages 4.7 out of 5 from 24 ratings, while Undulator averages 4.3 from 11 ratings.
Do SynthScaper LE or Undulator have ads?
Neither SynthScaper LE nor Undulator shows ads.
Which is updated more often, SynthScaper LE or Undulator?
SynthScaper LE ships an update every 3 weeks, and Undulator every 2 months. Most recently, SynthScaper LE was updated on October 9, 2026 and Undulator on October 7, 2026.

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