Zero Chorus vs Filterstep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Roland Dimension D style chorus
- Feedback control for flanging
- AUv3 audio unit extension
- Expanded touch controls
- Desktop quality algorithm
- Thickens guitar and synth parts
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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.
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.
- Real-time rhythmic movement
- Intricate filter effect settings
- Filter randomization
- Three filter types
- Sequencer movement control
- Infinity mode
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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
Verdict
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
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.
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.
Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on October 1, 2026 and August 14, 2026 respectively.
| Parameter | Zero Chorus | Filterstep |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.2 (22 ratings) | 4.7 (42 ratings) — better |
| Positive reviews | 42.9% of reviews | 73.3% of reviews — better |
| Number of ratings | 22 | 42 — better |
| Update frequency | Every 6 months | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 9.3 — better |
| Further details — not scored | ||
| Size | 15 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Blamsoft, Inc. | AUDIOMODERN |
Customer experience
Zero Chorus
Filterstep
In-app purchases
Zero Chorus
No in-app purchases
Filterstep
No in-app purchases







