Comparison

Spring Reverb vs RRS Passive EQ Collection

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

Head to head
About

Spring Reverb

This app emulates the sound of vintage spring reverbs found in guitar amplifiers, offering unique sonic possibilities beyond traditional hardware. It allows for detailed manipulation of physical parameters, creating both authentic and experimental reverb effects for various instruments.

Highlights
  • Emulates popular spring reverb sounds
  • Manipulate physical spring parameters
  • Morph between different spring configurations
  • Tempo-synced reverb decay
  • Tube-amp style tremolo (pre/post reverb)
  • Modulation for chorus-like effects
  • Dynamic control with The Ribbon
Read full description

Spring Reverb models the sound and character of popular spring reverbs found in guitar amplifiers, popularized by Surf, Garage and Rockabilly music. Spring takes this a step further by allowing manipulation of physical parameters not normally available in a real spring tank. The results vary from faithful recreations of real springs to distinctive new sounds that push the physical boundaries of reverb. Guitarists love the revered surfer vibe but all creative musicians will find that Spring makes any synthesizer, drum, or vocal stand out in a mix. This vintage reverb sound originally derived from the reflections of sound waves traveling through springs has been given an overhaul for the 21st century and beyond. Eventide Spring contains two different sized ‘spring tanks’ along with the ability to morph between one and three springs. Easily program The Ribbon to seamlessly transition between any two settings in real-time! The added tube-amp-style tremolo can be routed before or after the spring resulting in an unrivaled ability to craft your own unique reverb sound. Alter the intensity by changing the tremolo depth and adjust the tremolo rate in Hz, or note value when tempo-synced to your project. Features: - Artist presets by Matt Lange, Nick Hook, and Nu-Trix. - Tempo Sync reverb decay to your DAW. - Craft original sounds by changing the number of springs and damping frequency. - Alter overall resonance by selecting the size of the spring tank. - Tube-amp-style tremolo that can be routed pre- or post-reverb. - Create chorus-like effects by altering Modulation Level. - The Ribbon controller allows for dynamic modification of several knobs at once to easily morph between settings. - Programmable Hotswitch provides the ability to jump instantly to an alternate sound at the push of a button. - Available as an Audio Units AUv3 plug-in and Standalone App.

About

RRS Passive EQ Collection

This app offers a collection of vintage-inspired equalizers, combining three classic models into a single, full-featured audio plugin. It provides detailed control over tone shaping for music production and mixing. A demo version is available with limited playtime.

Highlights
  • Combines EQP-1A, MEQ-5, and HLF-3C equalizers
  • Standalone and AUv3 plugin support
  • Modeled vintage analog saturation
  • Undo/Redo functionality
  • A/B comparison
  • Macro controllers
  • Built-in Gain Match
Read full description

The Passive EQ Collection 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 Passive EQ Collection AUv3 plug-in as many times as you want, thereby you get the Demo period again and again.) Unlimited version of Passive EQ Collection AUv3 plug-in comes as In-App Purchase. SPECIFICATIONS: • Three classics, EQP-1A, MEQ-5 and HLF-3C, combined in one full-featured equalizer; • Standalone and AUv3 Plug-in; • Modeled vintage Equalizers; • On/Off Analog Saturation; • Undo/Redo; • A/B; • 2x/4x/8x Upsampling; • Macro controllers; • Built-in Gain Match; • Scalable GUI. The EQP-1A based on Classic Program Equalizer from the '60s, original EQ is renowned for its unique ability to boost and cut the same frequencies simultaneously, thereby creating a resonant shelf, the EQP-1A faithfully models the overbuilt transformers and complex tube amplifiers of the original hardware. Conceived and created for broadband equalization, the EQP-1A features 4 low boost/cut frequencies, 3 high-cut frequencies and 7 HF boost points, along with a bandwidth control for shaping the high boost curve. The MEQ-5 based on Classic Mid-Range Equalizer from the '70s, with two bands of midrange boost and one band of midrange dip, the MEQ-5 gets the very best out of the «power region» where guitars and vocals can make or break a mix. The MEQ-5 provides exacting control of the «power region» in program material, that frequency range from about 300 Hz to 5000 Hz in which most of the sound energy is concentrated. The ear is especially sensitive to sounds in this region. In this region, even small resonances in studio acoustics and microphone and speaker responses are very evident in their effect on the listenability of the sound. Three independent sets of controls make it possible to boost on a peak curve at 200…1000 Hz while simultaneously boosting on a peak curve at 1.5…5 kHz, while simultaneously dipping at 200…7000 Hz. The original HLF-3C hardware unit is a true passive design: there are no input/output amplifiers and it does not require any external power. As a result, there is an inherent loss of signal level when using the HLF-3C hardware. The RRS HLF-3C compensates for this inherent signal loss for simplified use in the modern era: it has unity gain upon insertion (there is no insertion loss until one or both of the cut filters is engaged). The broadband EQP-1A, the midrange MEQ-5 and the passive high/low filter HLF-3C together comprise a full range vintage EQ chain. To use Passive EQ Collection as a plug-in, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — Passive EQ Collection will appear in the list of Audio Unit extensions for effect plug-ins in the host app.

Screenshots

Spring Reverb3 screens
RRS Passive EQ Collection4 screens

Verdict

The call

The clearest difference is review sentiment: RRS Passive EQ Collection at 100% against Spring Reverb's 54%. RRS Passive EQ Collection also leads on price (Free vs $14.99) and rating (4.8 vs 3.9). Spring Reverb's advantage is in-app purchases (none vs 1). On ratings volume, ads, device support and iOS requirement 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

RRS Passive EQ Collection is free to download; Spring Reverb costs $14.99 up front. RRS Passive EQ Collection sells 1 one-off in-app purchase. Spring Reverb asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RRS Passive EQ Collection holds the better App Store score, 4.8 against 3.9. Both are backed by a comparable volume of ratings — 13 and 16 respectively. Written reviews point the same way: 54% of Spring Reverb's written reviews are positive against 100% of RRS Passive EQ Collection's.

UpkeepUpdate frequency

Spring Reverb ships an update every 13 months, RRS Passive EQ Collection every 2 months. Both last shipped on November 3, 2026.

Scorecard6 real differences · 4 level
Spring Reverb versus RRS Passive EQ Collection: the parameters behind the verdict, then further details
ParameterSpring ReverbRRS Passive EQ Collection
Price$14.99Free — better
Rating3.9 (13 ratings)4.8 (16 ratings) — better
Positive reviews53.8% of reviews100.0% of reviews — better
Number of ratings1316 — better
Update frequencyEvery 13 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.010.0 — better
Further details — not scored
Size22 MB22 MB
Age rating4+4+
DeveloperEventideRRS, OOO

Customer experience

Spring Reverb

All ratings13 ratings
Positive69.2%
Neutral0.0%
Negative30.8%
Written reviews13 reviews
Positive53.8%
Neutral0.0%
Negative46.2%

RRS Passive EQ Collection

All ratings15 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Spring Reverb

No in-app purchases

1 purchases

RRS Passive EQ Collection

One-time1
  • RRS Passive EQ Collection Full$8.99

Questions

Is Spring Reverb free?
Spring Reverb costs $14.99, with no in-app purchases.
Is RRS Passive EQ Collection free?
RRS Passive EQ Collection is free to download, with in-app purchases available.
Which has better reviews, Spring Reverb or RRS Passive EQ Collection?
RRS Passive EQ Collection is rated higher. Spring Reverb averages 3.9 out of 5 from 13 ratings, while RRS Passive EQ Collection averages 4.8 from 16 ratings.
Do Spring Reverb or RRS Passive EQ Collection have ads?
Neither Spring Reverb nor RRS Passive EQ Collection shows ads.
Which is updated more often, Spring Reverb or RRS Passive EQ Collection?
Spring Reverb ships an update every 13 months, and RRS Passive EQ Collection every 2 months. Most recently, Spring Reverb was updated on November 3, 2026 and RRS Passive EQ Collection on November 3, 2026.

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