Comparison

Ring Modulator vs EvilTwin

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

Head to head
About

Ring Modulator

This app creates unique metallic and bell-like timbres by multiplying two audio signals. It offers three modes for versatile sound design, from internal oscillators to sidechaining external audio.

Highlights
  • Ring modulation effect
  • Dual input capability
  • Three distinct modes (OSC+OSC, INPUT+OSC, INPUT+SIDECHAIN)
  • Mono and stereo input support
  • Adjustable carrier and modulator frequencies
  • Mix and output gain controls
Features
Read full description

Ring modulation multiplies two signals together sample by sample. The result contains the sum and difference of their frequencies, the sidebands, while the original carrier and modulator tones are suppressed. This produces the metallic, bell-like, and clangorous inharmonic timbres associated with classic ring modulators, from robot voices to detuned percussion. Signal path: the carrier is multiplied by the modulator to form the wet signal, Mix blends that against the dry carrier, and Output applies a final makeup gain. Ring Modulator is usable in three modes and can take either mono or stereo inputs. The host app must support mixing to bus inputs or sidechaining in order to use Ring Modulator with dual input. Outputs mono signal. OSC + OSC Both carrier and modulator are internal sine oscillators, set by Car Freq and Mod Freq. Produces classic two-tone ring modulation with no input required, good for bell tones and metallic drones. INPUT + OSC The carrier is your track's audio and the modulator is the internal sine at Mod Freq. This is the standard ring-mod effect: it turns voices and instruments metallic or robotic and adds inharmonic sidebands. This is the default mode. INPUT + SIDECHAIN The carrier is the main input and the modulator is a second, independent input routed into the plugin's sidechain bus. Use it to ring-modulate one track by another, for example a vocal shaped by a drum loop or synth pad. This requires a host that supports sidechain routing; if nothing is routed to the sidechain, the input passes through dry. Car Freq and Mod Freq do not apply in this mode.

About

EvilTwin

This audio effect plugin adds width, motion, and unique character to your sound. It offers creative stereo enhancement and dynamic spatial animation, suitable for subtle polish or dramatic transformations. Designed for musicians and sound designers, it encourages sonic exploration with a focused interface.

Highlights
  • Creative stereo enhancement and widening
  • Dynamic movement and spatial animation
  • Subtle-to-extreme sound shaping
  • Performance-focused interface
  • AUv3 support for iPad and Mac
  • Works with popular music hosts
Features
Read full description

Evil Twin is a creative stereo processing effect designed to add width, motion, depth, and unexpected character to your sound. Built for musicians, producers, sound designers, and experimental artists, Evil Twin combines stereo enhancement with controlled instability, allowing you to move from subtle spatial polish to dramatic transformations with a simple and focused interface. Whether you're widening a synth, adding movement to a pad, creating animated textures, or pushing sounds into unfamiliar territory, Evil Twin encourages exploration while remaining fast and musical to use. Features: • Creative stereo enhancement and widening • Dynamic movement and spatial animation • Subtle-to-extreme sound shaping possibilities • Simple, performance-focused interface • AUv3 support for iPad and Mac • Works in compatible hosts including GarageBand, Logic Pro, AUM, Cubasis, and Audiobus Evil Twin is designed for creators who enjoy discovering new sounds rather than following predictable presets. Sometimes the best results happen when things drift a little off course. Basic usage guide at folinaaudio.com.

Screenshots

Ring Modulator4 screens
EvilTwin1 screens

Verdict

The call

The clearest difference is device support: EvilTwin at 4 against Ring Modulator's 2. EvilTwin also leads on iOS requirement (12.0 vs 17.0). Ring Modulator's advantage is price ($1.99 vs $2.99). On rating, ratings volume, 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

Ring Modulator costs $1.99 and EvilTwin $2.99 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 — 5.0 for Ring Modulator against 5.0 for EvilTwin. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Scorecard3 real differences · 6 level
Ring Modulator versus EvilTwin: the parameters behind the verdict, then further details
ParameterRing ModulatorEvilTwin
Price$1.99 — better$2.99
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings12 — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS17.012.0 — better
Further details — not scored
Size8 MB17 MB
Age rating4+4+
DeveloperCallback Audio, LLCJeremy Phillips

Customer experience

Ring Modulator

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

EvilTwin

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Ring Modulator

No in-app purchases

None

EvilTwin

No in-app purchases

Questions

Is Ring Modulator free?
Ring Modulator costs $1.99, with no in-app purchases.
Is EvilTwin free?
EvilTwin costs $2.99, with no in-app purchases.
Which has better reviews, Ring Modulator or EvilTwin?
Ring Modulator and EvilTwin are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Ring Modulator or EvilTwin have ads?
Neither Ring Modulator nor EvilTwin shows ads.

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