Zero Chorus vs RRS EQ3
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.
RRS EQ3
This audio effect plugin offers vintage-inspired tonal adjustments with five broad, interacting bands. It emulates an '80s approach to frequency shaping, allowing for precise control over your mix's clarity and low-end response. A demo version is available for trial before unlocking the full unlimited experience.
- Standalone and AUv3 plugin
- Modeled vintage EQ
- Multiple fixed and boost-only bands
- Stereo, Mid, or Side EQ modes
- Undo/Redo and A/B comparison
- Scalable GUI
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EQ3 AUv3 plug-in — comes as time-limited Demo-version for you to try. It gives you 5 minutes of Free play time. (You can reload the EQ3 AUv3 plug-in as many times as you want, thereby you get the Demo period again and again.) Unlimited version of EQ3 AUv3 plug-in comes as In-App Purchase. In the '80s it was the first to use a different approach to tonal adjustments. In conventional analog equalizers, whether they are shelving, sweepable, graphic or parametric types, various sections of the audio spectra are boosted or attenuated by adding or subtracting bandpasses. In this case, frequency shaping is achieved by summing bandpasses. Our emulation of this method is quite similar to the original and improved with additional possibilities of digital technology. Now you can hear it for yourself. There are five broad, overlapping, interacting bands: 10 (Sub), 40, 160, 650 and 2.5 кHz, along with the «rock (airy) band» control, which is an HF boost-only control. Features: • Standalone and AUv3 plug-in; • Precise port of Rack Extensions plug-in; • Modeled vintage EQ; • Boost only shelf at 2.5 kHz, 5 kHz, 10 kHz, 20 kHz and 40 kHz; • 2.5 kHz fixed boost and cut shelf; • 650 Hz fixed boost and cut bell; • 160 Hz fixed boost and cut bell; • 40 Hz fixed boost and cut bell; • SUB (10 Hz) fixed boost and cut bell; • Stereo (Mono), Mid or Side EQ modes; • Undo/Redo; • A/B comparison; • 2x/4x/8x Upsampling; • Macro controllers; • Built-in Gain Match; • Scalable GUI. When using the EQ3, remember that the bands are broad, approximately 2 octaves. They overlap one another. For example: when boosting the 10 kHz «rock band» to a +6 position on the knob, to keep the response flat through in 2.5 kHz region you should rotate the 2.5 kHz coarse knob to about a -1 position. The amount you back off the 2.5 kHz control should, of course, be set by ear. Following this kind of procedure will accomplish a more airy sound, with much more clarity. You can accomplish the same thing for the low frequency response by applying the same principles. The EQ3 will reach further into your mix than you've ever heard before with minimal phase distortion. As a result, you may need to take a little time and «play around» with the controls on the EQ3 before you can make intuitive adjustments. To use EQ3 as a plug-in, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — EQ3 will appear in the list of Audio Unit extensions for effect plug-ins in the host app.
Screenshots
Verdict
The clearest difference is review sentiment: RRS EQ3 at 100% against Zero Chorus's 43%. RRS EQ3 also leads on price (Free vs $2.99) and rating (4.8 vs 4.2). Zero Chorus's advantage is in-app purchases (none vs 1). On ratings volume, 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
RRS EQ3 is free to download; Zero Chorus costs $2.99 up front. RRS EQ3 sells 1 one-off in-app purchase. Zero Chorus asks for nothing beyond the download.
RRS EQ3 holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 22 and 23 respectively. Written reviews point the same way: 43% of Zero Chorus's written reviews are positive against 100% of RRS EQ3's.
Zero Chorus ships an update every 6 months, RRS EQ3 monthly. The most recent releases landed on September 26, 2026 and August 20, 2026 respectively.
| Parameter | Zero Chorus | RRS EQ3 |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.2 (22 ratings) | 4.8 (23 ratings) — better |
| Positive reviews | 42.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 22 | 23 — better |
| Update frequency | Every 6 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Blamsoft, Inc. | RRS, OOO |
Customer experience
Zero Chorus
RRS EQ3
In-app purchases
Zero Chorus
No in-app purchases
RRS EQ3
- RRS EQ3 Unlimited$4.99









