Comparison

PolyBud Polyrhythmic Sequencer vs isxynth

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

isxynth

This music effect plugin allows spectral cross synthesis and morphing between two input signals. It separates noise and tone components, offering controls for blending, freezing, and time-based delays. Gestures on controls can be recorded and played back for dynamic sound shaping.

Highlights
  • Spectral cross synthesis
  • Morphing between two input signals
  • Noise and tone component blending
  • Freeze control for spectral blurring
  • 3-second delay lines per input
  • Gesture recording and playback
Features
Read full description

isxysnth is spectral cross synthesis / morphing plugin it gets two input signals, splits each one into 2 parts containing noise and tone components and then allows morphing between all these elements. Freeze control allows spectral blurring-like effect for both input signals, two 3 second delay lines allow selection of different signal in time and also provide "freeze" effect you can process left and right channels on stereo source or use this effect as multi-input AUv3 - in that case it will use 2 stereo inputs. Standalone mode currently works only in "mono" mode - three XY controls set balance between tone and noise components, amount of freeze and set up morphing - both inputs have 3-second delay line; freeze button ("*") toggles off recording. - gestures on all the main controls (3 xy pads and two sliders) can be recorded and played back when appropriate button with ">" label is toggled on - in current version standalone app supports only mono (L + R as inputs I and II) processing

Screenshots

PolyBud Polyrhythmic Sequencer4 screens
isxynth3 screens

Verdict

The call

The clearest difference is rating: PolyBud Polyrhythmic Sequencer at 4.9 against isxynth's 3.7. PolyBud Polyrhythmic Sequencer also leads on update cadence (every 2 weeks vs every 34 months) and price ($5.99 vs $7.99). isxynth's advantage is iOS requirement (11.0 vs 13.0). On review sentiment, 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

PolyBud Polyrhythmic Sequencer costs $5.99 and isxynth $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

PolyBud Polyrhythmic Sequencer holds the better App Store score, 4.9 against 3.7. Both are backed by a comparable volume of ratings — 9 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

PolyBud Polyrhythmic Sequencer ships an update every 2 weeks, isxynth every 34 months. Both last shipped on October 18, 2026.

Scorecard5 real differences · 5 level
PolyBud Polyrhythmic Sequencer versus isxynth: the parameters behind the verdict, then further details
ParameterPolyBud Polyrhythmic Sequencerisxynth
Price$5.99 — better$7.99
Rating4.9 (9 ratings) — better3.7 (3 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings9 — better3
Update frequencyEvery 2 weeks — betterEvery 34 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.011.0 — better
Further details — not scored
Size7 MB8 MB
Age rating4+4+
DeveloperCem OlcayAlexey Nadzharov

Customer experience

PolyBud Polyrhythmic Sequencer

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

isxynth

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

PolyBud Polyrhythmic Sequencer

No in-app purchases

None

isxynth

No in-app purchases

Questions

Is PolyBud Polyrhythmic Sequencer free?
PolyBud Polyrhythmic Sequencer costs $5.99, with no in-app purchases.
Is isxynth free?
isxynth costs $7.99, with no in-app purchases.
Which has better reviews, PolyBud Polyrhythmic Sequencer or isxynth?
PolyBud Polyrhythmic Sequencer is rated higher. PolyBud Polyrhythmic Sequencer averages 4.9 out of 5 from 9 ratings, while isxynth averages 3.7 from 3 ratings.
Do PolyBud Polyrhythmic Sequencer or isxynth have ads?
Neither PolyBud Polyrhythmic Sequencer nor isxynth shows ads.
Which is updated more often, PolyBud Polyrhythmic Sequencer or isxynth?
PolyBud Polyrhythmic Sequencer ships an update every 2 weeks, and isxynth every 34 months. Most recently, PolyBud Polyrhythmic Sequencer was updated on October 18, 2026 and isxynth on October 18, 2026.

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