Comparison

PolyPhase vs BLEASS Alpha Synthesizer

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

Head to head
About

PolyPhase

Create complex, interwoven melodies and rhythms with a generative sequencer. Control note generation, randomize sequences, and integrate with external MIDI hardware or the included wavetable synthesizer. Save and recall your creations with presets and snapshots.

Highlights
  • Generative melody creation with phase offsets
  • 8 independent sequencers with customizable properties
  • Draw own notes or use intelligent randomization
  • Wavetable synthesizer with FX
  • MIDI output and input support
  • Global Key/Scale filtering and Chord Masks
  • Save/Load presets and Snapshots
Read full description

PolyPhase is a generative sequencer! Melodies on a Master Track are created on the fly & copied, with phase offsets, to Follower Tracks. This structure, along with the interplay of various probabilities, leads to interwoven melodies and rhythms. You can disable the generation of notes & draw your own, or select some of the randomization functions Send MIDI to external hardware, other iOS instruments, or use the included wavetable synthesizer! - 8 independent Sequencers with their own rate, direction, transposition & other properties - Disable the generation of notes to draw your own, or use some of the intelligent functions provided - Random Euclid & Drum Sequences - The Wavetable Synth + FX lets you use PolyPhase even if you don't own any external Instruments - Filter notes to a Global Key / Scale and toggle Chord Masks - Save / Load Presets - Snapshots for install recall of your Sequences - Intelligently Randomize and Morph your Sequences & Synth sounds - Accepts external MIDI clock & can provide clock to other devices - Audiobus (Audio / State) & Inter-App Audio support - Link Support

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/

Screenshots

BLEASS Alpha Synthesizer4 screens

Verdict

The call

The clearest difference is in-app purchases: PolyPhase at none against BLEASS Alpha Synthesizer's 10. PolyPhase also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (10.0 vs 15.0). BLEASS Alpha Synthesizer's advantage is price ($14.99 vs $19.99) and rating (4.9 vs 4.6). On ads 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

PolyPhase costs $19.99 and BLEASS Alpha Synthesizer $14.99 up front. BLEASS Alpha Synthesizer sells 10 one-off in-app purchases. PolyPhase asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

BLEASS Alpha Synthesizer holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 26 and 109 respectively. Written reviews point the same way: 76% of PolyPhase's written reviews are positive against 86% of BLEASS Alpha Synthesizer's.

UpkeepUpdate frequency

PolyPhase ships an update every 3 weeks, BLEASS Alpha Synthesizer every 2 months. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

Scorecard9 real differences · 1 level
PolyPhase versus BLEASS Alpha Synthesizer: the parameters behind the verdict, then further details
ParameterPolyPhaseBLEASS Alpha Synthesizer
Price$19.99$14.99 — better
Rating4.6 (26 ratings)4.9 (109 ratings) — better
Positive reviews76.2% of reviews86.1% of reviews — better
Number of ratings26109 — better
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS10.0 — better15.0
Further details — not scored
Size35 MB38 MB
Age rating4++4
DeveloperMarcos KohlerBLEASS

Customer experience

PolyPhase

All ratings26 ratings
Positive88.5%
Neutral7.7%
Negative3.8%
Written reviews21 reviews
Positive76.2%
Neutral14.3%
Negative9.5%

BLEASS Alpha Synthesizer

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

In-app purchases

None

PolyPhase

No in-app purchases

10 purchases

BLEASS Alpha Synthesizer

One-time10
  • Sound Of Izrael Preset Pack$2.99
  • Red Sky Lullaby Preset Pack$2.99
  • MPE Preset Pack #1$3.99
Show 7 more
  • Lily Jordy Preset Pack$3.99
  • The GarageBand Guide Pack$3.99
  • Hoops Collection #1$3.99
  • Yawdel Preset Pack$3.99
  • Funk Preset Pack$3.99
  • Torley Preset Pack$4.99
  • The Sound Test Room Pack$4.99

Questions

Is PolyPhase free?
PolyPhase costs $19.99, with no in-app purchases.
Is BLEASS Alpha Synthesizer free?
BLEASS Alpha Synthesizer costs $14.99, and also offers in-app purchases.
Which has better reviews, PolyPhase or BLEASS Alpha Synthesizer?
BLEASS Alpha Synthesizer is rated higher. PolyPhase averages 4.6 out of 5 from 26 ratings, while BLEASS Alpha Synthesizer averages 4.9 from 109 ratings.
Do PolyPhase or BLEASS Alpha Synthesizer have ads?
Neither PolyPhase nor BLEASS Alpha Synthesizer shows ads.
Which is updated more often, PolyPhase or BLEASS Alpha Synthesizer?
PolyPhase ships an update every 3 weeks, and BLEASS Alpha Synthesizer every 2 months. Most recently, PolyPhase was updated on October 24, 2026 and BLEASS Alpha Synthesizer on October 29, 2026.

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