Comparison

PolyPhase vs AddStation

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

AddStation

Explore new sonic territories with this advanced additive synthesis tool. Create complex timbres by combining thousands of sine waves and unique morph sequencing. Integrate seamlessly with iOS production environments and enjoy a suite of built-in effects.

Highlights
  • Fractal additive synthesis
  • Sound morphing
  • Over 170 sound presets
  • AUv3 AudioUnit integration
  • Built-in effects suite
  • Audiobus 3 and Ableton Link support
Features
Read full description

The next generation of additive synthesis Additive synthesis is a sound synthesis technique that creates timbre by adding sine waves together. The timbre of musical instruments can be considered to consist of multiple harmonic or inharmonic partials or overtones. VirSyn already has a remarkable track record of products ( CUBE, POSEIDON ) trying to make this virtually unlimited synthesis method manageable for creative sound designers and musicians. AddStation is the next step forward giving you a tool to explore completely new sonic territory. The massive amount of sine waves in AddStation - thousands per voice - together with unique morph sequencing blocks blur the frontiers between analog and digital sonic realms. And all this integrated in all relevant iOS production environments especially the emerging AUv3 AudioUnit standard. Synthesis • Fractal additive synthesis • over 170 sound presets • Four parts with 8 Additive Sequence Blocks • Sound morphing • up to 512 partials per voice with independent AD envelopes • harmonic/inharmonic spectra • Ringmodulation • arbitrary filter function and noise spectra • four independent analog style Arpeggiators Effects • Chorus • Phaser • Flanger • Overdrive • Parametric EQ • Echo/Delay • Reverb Global • AUv3 for Host integration • Audiobus 3 compatible (Input slot) with state saving • Support for Ableton Link. • Inter-app audio compatible (Instrument/Generator) • CoreMIDI / Virtual MIDI • Audio recorder.

Screenshots

AddStation4 screens

Verdict

The call

The clearest difference is price: AddStation at $8.99 against PolyPhase's $19.99. AddStation also leads on update cadence (weekly vs every 3 weeks) and device support (3 vs 1). PolyPhase's advantage is iOS requirement (10.0 vs 12.0). On rating, review sentiment, ratings volume and 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 AddStation $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for PolyPhase against 4.5 for AddStation. Both are backed by a comparable volume of ratings — 26 and 43 respectively. Written reviews are what separate them: 76% of PolyPhase's written reviews are positive against 82% of AddStation's.

UpkeepUpdate frequency

PolyPhase ships an update every 3 weeks, AddStation weekly. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

Scorecard4 real differences · 6 level
PolyPhase versus AddStation: the parameters behind the verdict, then further details
ParameterPolyPhaseAddStation
Price$19.99$8.99 — better
Rating4.6 (26 ratings) — better4.5 (43 ratings)
Positive reviews76.2% of reviews82.1% of reviews — better
Number of ratings2643 — better
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS10.0 — better12.0
Further details — not scored
Size35 MB133 MB
Age rating4+4+
DeveloperMarcos KohlerHarry Gohs

Customer experience

PolyPhase

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

AddStation

All ratings43 ratings
Positive88.4%
Neutral4.7%
Negative7.0%
Written reviews39 reviews
Positive82.1%
Neutral2.6%
Negative15.4%

In-app purchases

None

PolyPhase

No in-app purchases

None

AddStation

No in-app purchases

Questions

Is PolyPhase free?
PolyPhase costs $19.99, with no in-app purchases.
Is AddStation free?
AddStation costs $8.99, with no in-app purchases.
Which has better reviews, PolyPhase or AddStation?
PolyPhase is rated higher. PolyPhase averages 4.6 out of 5 from 26 ratings, while AddStation averages 4.5 from 43 ratings.
Do PolyPhase or AddStation have ads?
Neither PolyPhase nor AddStation shows ads.
Which is updated more often, PolyPhase or AddStation?
PolyPhase ships an update every 3 weeks, and AddStation weekly. Most recently, PolyPhase was updated on October 7, 2026 and AddStation on October 9, 2026.

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