Comparison

BLEASS Alpha Synthesizer vs PolyBud Polyrhythmic Sequencer

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

Head to head
About

BLEASS Alpha Synthesizer

This versatile polyphonic synthesizer offers a virtual analog sound engine inspired by classic hardware. It provides intuitive sound design tools, efficient CPU usage, and a unique motion sequencer for expressive modulation. Explore a vast library of presets and create unique sounds for your music.

Highlights
  • Virtual analog polyphonic stereo synthesizer
  • Intuitive sound design interface
  • CPU efficient for live performance
  • Unique motion sequencer
  • Built-in arpeggiator
  • Over 200 factory presets
  • Audio Unit V3 compatible
Read full description

BLEASS Alpha Synthesizer is a versatile virtual analogue polyphonic synthesizer built for immediate, hands-on sound design. Its three oscillators combine variable waveshapes and pulse widths with unison, hard sync, cross modulation and ring modulation, while dual variable-state filters with drive add further colour and character. The streamlined interface follows the natural signal path, keeping powerful synthesis controls accessible at a glance. Bring sounds to life with three ADSR envelopes, two multi-waveform LFOs and extensive modulation possibilities, while the Motion Sequencer adds rhythmic and expressive movement that can work hand in hand with the built-in arpeggiator. MPE support extends the performance possibilities, and BLEASS' efficient audio engine keeps the experience smooth and responsive on mobile devices. A complete built-in effects section includes Overdrive, Bitcrusher, Tremolo, filtered ping-pong Delay and Reverb, adding everything from subtle movement to more radical processing directly within the synth. More than 200 factory presets provide ready-to-play sounds and starting points for your own creations. BLEASS Alpha Synthesizer can be used as a standalone app or AUv3 instrument on iPhone and iPad. Also available for Windows and macOS. More information and technical specifications available on: https://www.bleass.com/alpha/

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.

Screenshots

BLEASS Alpha Synthesizer4 screens
PolyBud Polyrhythmic Sequencer4 screens

Verdict

The call

The clearest difference is price: PolyBud Polyrhythmic Sequencer at $3.99 against BLEASS Alpha Synthesizer's $14.99. PolyBud Polyrhythmic Sequencer also leads on in-app purchases (none vs 10) and review sentiment (100% vs 86%). BLEASS Alpha Synthesizer's advantage is ratings volume (108 vs 9). On rating, update cadence, ads 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

BLEASS Alpha Synthesizer costs $14.99 and PolyBud Polyrhythmic Sequencer $3.99 up front. BLEASS Alpha Synthesizer sells 10 one-off in-app purchases. PolyBud Polyrhythmic Sequencer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for BLEASS Alpha Synthesizer against 4.9 for PolyBud Polyrhythmic Sequencer. That said, the two scores are not equally well evidenced: BLEASS Alpha Synthesizer has 108 ratings behind it against 9, so its average is the more settled of the two. Written reviews are what separate them: 86% of BLEASS Alpha Synthesizer's written reviews are positive against 100% of PolyBud Polyrhythmic Sequencer's.

UpkeepUpdate frequency

BLEASS Alpha Synthesizer ships an update every 2 months, PolyBud Polyrhythmic Sequencer every 5 weeks. The most recent releases landed on September 20, 2026 and September 21, 2026 respectively.

Scorecard6 real differences · 4 level
BLEASS Alpha Synthesizer versus PolyBud Polyrhythmic Sequencer: the parameters behind the verdict, then further details
ParameterBLEASS Alpha SynthesizerPolyBud Polyrhythmic Sequencer
Price$14.99$3.99 — better
Rating4.9 (108 ratings)4.9 (9 ratings)
Positive reviews86.1% of reviews100.0% of reviews — better
Number of ratings108 — better9
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size38 MB7 MB
Age rating4+4+
DeveloperBLEASSCem Olcay

Customer experience

BLEASS Alpha Synthesizer

All ratings108 ratings
Positive97.2%
Neutral1.9%
Negative0.9%
Written reviews36 reviews
Positive86.1%
Neutral11.1%
Negative2.8%

PolyBud Polyrhythmic Sequencer

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

In-app purchases

10 purchases

BLEASS Alpha Synthesizer

One-time10
  • MPE Preset Pack #1$1.99
  • Sound Of Izrael Preset Pack$1.99
  • Red Sky Lullaby Preset Pack$1.99
Show 7 more
  • Lily Jordy Preset Pack$1.99
  • The GarageBand Guide Pack$1.99
  • Hoops Collection #1$1.99
  • Yawdel Preset Pack$1.99
  • Funk Preset Pack$1.99
  • Torley Preset Pack$2.99
  • The Sound Test Room Pack$2.99
None

PolyBud Polyrhythmic Sequencer

No in-app purchases

Questions

Is BLEASS Alpha Synthesizer free?
BLEASS Alpha Synthesizer costs $14.99, and also offers in-app purchases.
Is PolyBud Polyrhythmic Sequencer free?
PolyBud Polyrhythmic Sequencer costs $3.99, with no in-app purchases.
Which has better reviews, BLEASS Alpha Synthesizer or PolyBud Polyrhythmic Sequencer?
BLEASS Alpha Synthesizer and PolyBud Polyrhythmic Sequencer are both rated 4.9 out of 5 on the App Store, from 108 and 9 ratings respectively.
Do BLEASS Alpha Synthesizer or PolyBud Polyrhythmic Sequencer have ads?
Neither BLEASS Alpha Synthesizer nor PolyBud Polyrhythmic Sequencer shows ads.
Which is updated more often, BLEASS Alpha Synthesizer or PolyBud Polyrhythmic Sequencer?
BLEASS Alpha Synthesizer ships an update every 2 months, and PolyBud Polyrhythmic Sequencer every 5 weeks. Most recently, BLEASS Alpha Synthesizer was updated on September 20, 2026 and PolyBud Polyrhythmic Sequencer on September 21, 2026.

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