Comparison

Zero Chorus vs Filterstep

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

Head to head
About

Zero Chorus

This audio effect plugin provides a high-quality chorus inspired by the Roland Dimension D, offering a versatile sound without muddy low end. It integrates seamlessly with iOS DAWs and supports expanded controls for easy tweaking.

Highlights
  • Roland Dimension D style chorus
  • Feedback control for flanging
  • AUv3 audio unit extension
  • Expanded touch controls
  • Desktop quality algorithm
  • Thickens guitar and synth parts
Read full description

Looking for a rich chorus effect without a muddy low end? Zero Chorus is a high quality Roland Dimension D style chorus plug-in. The addition of a feedback control improves versatility by enabling flanging effects. Zero Chorus is an Audio Unit Extension (AUv3) that works inside host apps. Just open up your favorite host that supports Audio Units and add it as an effect. The controls expand when touched so they can be easily seen while tweaking. Zero Chorus brings a superb chorus algorithm to your favorite iOS DAW. Compatible with GarageBand, Cubasis, Auria, BeatMaker, AudioBus, AUM, Modstep, and more. Blamsoft brings their experience creating top notch plug-ins for the desktop to iOS. The same algorithm is found in the popular Zero Hybrid Synthesizer Rack Extension for Propellerhead Reason. The available parameters allow you to dial in a wide variety of chorus effects, from transparent to heavy. It's great for thickening electric guitar or synth parts. You get a desktop quality algorithm at an iOS friendly price. Tap Developer Website for sound examples. Note: Second screenshot shows the effect of touching a control.

About

Filterstep

This app offers a creative motion filter plugin for real-time rhythmic movement. Explore intricate patterns and sonic possibilities with various filter effect settings and randomization. Shape any sound into a unique groove.

Highlights
  • Real-time rhythmic movement
  • Intricate filter effect settings
  • Filter randomization
  • Three filter types
  • Sequencer movement control
  • Infinity mode
Read full description

Filterstep is a creative motion filter plugin which provides all kinds of intricate rhythmic movement to any input in real-time. It can give you incredibly complex and nuanced results based on various filter effect settings, and almost infinite possibilities for sonic exploration through filter randomization. You can choose between three filter types, range, frequency, quantization, sequencer movement and more. Craft interesting patterns, or let it run endlessly using the infinity mode. Add filter motion and shape any sound into a groove.

Screenshots

Zero Chorus2 screens
Filterstep2 screens

Verdict

The call

The clearest difference is price: Filterstep at Free against Zero Chorus's $2.99. Filterstep also leads on rating (4.7 vs 4.2) and review sentiment (73% vs 43%). 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

CostPrice · In-app purchases · Ads · Monetization

Filterstep is free to download; Zero Chorus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Filterstep holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 22 and 42 respectively. Written reviews point the same way: 43% of Zero Chorus's written reviews are positive against 73% of Filterstep's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on October 1, 2026 and August 14, 2026 respectively.

Scorecard4 real differences · 6 level
Zero Chorus versus Filterstep: the parameters behind the verdict, then further details
ParameterZero ChorusFilterstep
Price$2.99Free — better
Rating4.2 (22 ratings)4.7 (42 ratings) — better
Positive reviews42.9% of reviews73.3% of reviews — better
Number of ratings2242 — better
Update frequencyEvery 6 monthsEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.09.3 — better
Further details — not scored
Size15 MB12 MB
Age rating4+4+
DeveloperBlamsoft, Inc.AUDIOMODERN

Customer experience

Zero Chorus

All ratings22 ratings
Positive77.3%
Neutral4.5%
Negative18.2%
Written reviews21 reviews
Positive42.9%
Neutral4.8%
Negative52.4%

Filterstep

All ratings42 ratings
Positive88.1%
Neutral4.8%
Negative7.1%
Written reviews15 reviews
Positive73.3%
Neutral13.3%
Negative13.3%

In-app purchases

None

Zero Chorus

No in-app purchases

None

Filterstep

No in-app purchases

Questions

Is Zero Chorus free?
Zero Chorus costs $2.99, with no in-app purchases.
Is Filterstep free?
Filterstep is free to download, with no in-app purchases.
Which has better reviews, Zero Chorus or Filterstep?
Filterstep is rated higher. Zero Chorus averages 4.2 out of 5 from 22 ratings, while Filterstep averages 4.7 from 42 ratings.
Do Zero Chorus or Filterstep have ads?
Neither Zero Chorus nor Filterstep shows ads.
Which is updated more often, Zero Chorus or Filterstep?
Zero Chorus ships an update every 6 months, and Filterstep every 6 months. Most recently, Zero Chorus was updated on October 1, 2026 and Filterstep on August 14, 2026.

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