SynthScaper LE vs PolyBud Polyrhythmic Sequencer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
PolyBud Polyrhythmic Sequencer
Create complex musical sequences with multiple polyrhythmic tracks. Control note, velocity, gate, and MIDI CC parameters with independent step lengths and rates. Route MIDI output to your favorite synths and AUv3 hosts.
- Multitrack polyrhythmic MIDI sequencing
- Note and MIDI CC tracks
- Configurable step lengths per mode
- Independent track rates
- Assignable MIDI channels
- Ramp value for CC smoothing
- AUv3 plugin support
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PolyBud is a multitrack polyrhythmic AUv3 MIDI sequencer. You can add multiple note or MIDI CC tracks to the each pattern. The note tracks has the note, velocity, gate, ratchet, probability and randomisation modes. You can set different step lengths to the each mode which would introduce polyrhythmic variations immediately. Another great feature is the each track can run in a different rate which is great for creating unique polyrhythmic sequences. Also, you can assign different MIDI channels to the each track so that you can control multiple synths within a single PolyBud pattern. The MIDI CC tracks is great for modulating the synth parameters. You can introduce polyrhythmic modulations by setting the different step lengths and different rates to your MIDI CC tracks. Also, you can set a ramp value for smoothing up the CC value changes per step. If you set the ramp value to 0% then you can have the classic sample and hold modulation. PolyBud is a MIDI app and it don't produce any sound of its own. You need to route PolyBud's MIDI out to your audio apps in order to run PolyBud. For the AUv3 plugin, you need an AUv3 host app such as AUM, Cubase, NanoStudio, ZenBeats, BeatMaker, apeMatrix etc.
Screenshots
Verdict
The clearest difference is review sentiment: PolyBud Polyrhythmic Sequencer at 100% against SynthScaper LE's 73%. PolyBud Polyrhythmic Sequencer also leads on rating (4.9 vs 4.7). SynthScaper LE's advantage is price ($4.99 vs $5.99) and iOS requirement (11.0 vs 13.0). 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
SynthScaper LE costs $4.99 and PolyBud Polyrhythmic Sequencer $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PolyBud Polyrhythmic Sequencer holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 24 and 9 respectively. Written reviews point the same way: 73% of SynthScaper LE's written reviews are positive against 100% of PolyBud Polyrhythmic Sequencer's.
Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.
| Parameter | SynthScaper LE | PolyBud Polyrhythmic Sequencer |
|---|---|---|
| Price | $4.99 — better | $5.99 |
| Rating | 4.7 (24 ratings) | 4.9 (9 ratings) — better |
| Positive reviews | 72.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 24 — better | 9 |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 94 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Igor Vasiliev | Cem Olcay |
Customer experience
SynthScaper LE
PolyBud Polyrhythmic Sequencer
In-app purchases
SynthScaper LE
No in-app purchases
PolyBud Polyrhythmic Sequencer
No in-app purchases
Questions
Is SynthScaper LE free?
Is PolyBud Polyrhythmic Sequencer free?
Which has better reviews, SynthScaper LE or PolyBud Polyrhythmic Sequencer?
Do SynthScaper LE or PolyBud Polyrhythmic Sequencer have ads?
Which is updated more often, SynthScaper LE or PolyBud Polyrhythmic Sequencer?
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