Comparison

Stereo Phaser vs Stereo Modulator

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

Head to head
About

Stereo Phaser

This audio effect app provides a stereo phaser with adjustable rate, depth, feedback, and stereo spread. It functions as an Audio Unit AUv3 plugin for hosts like GarageBand or as a standalone application for real-time audio processing.

Highlights
  • Stereo phaser effect
  • Adjustable rate, depth, feedback
  • Stereo spread control
  • Audio Unit AUv3 plugin
  • Standalone app mode
  • Real-time audio processing
Features
Read full description

That is nice phaser effect that can run in stereo mode. The app is Audio Unit AUv3. In stereo mode the signal is split and run through 2 phaser effects with different frequency settings but same rate, depth and feedback that are shifted in stereo space with the same rate(same as the phasers’) The app is an Audio Unit Effect AUV3 and can be used inside GarageBand or other AU host apps as an effect plug-in. Stereo Phaser can also run as a stand alone app adding effect to the audio input so you can play your guitar, bass or synth directly through the app if you have the connector to do so. Stereo Phaser controls: - Rate - that is the phaser speed - Depth - phaser depth - Feedback - effect feedback - Stereo - stereo spread

About

Stereo Modulator

This audio effect plugin transforms mono sound into stereo, adding width and depth. It uses micro-delays to create a natural sense of space, with optional LFO modulation for a Leslie speaker-like effect without pitch shifting. Ideal for creating separation in mixes, especially for guitars and vocals.

Highlights
  • Mono to stereo conversion
  • Adjustable stereo width
  • Optional LFO modulation
  • Micro-delay de-correlators
  • Creates natural spatial depth
  • No pitch shifting or echo
Features
Read full description

Stereo Modulator is an AU3 effect that converts mono sound into stereo, with an adjustable width and optional LFO modulation. It works by using a bank of randomized stereo de-correlators that apply micro-delays to introduce random differences between the spectrums of the left and right audio channels. In its output we hear a natural sense of space that is not present in mono recordings. It's similar to the sound space one gets from using a stereo reverb plugin except that it is tight and clear, without echo. It can operate either as a static effect or it can be gently modulated by a low-frequency oscillator. The modulation is akin to the sound of a Leslie speaker, except that it doesn't do any pitch shifting, so the output remains focused and tuning is not compromised. This effect is especially useful for mixing overdriven electric guitar sounds together with vocals. Using Stereo Modulator on the guitars, we can push them out to the sides, creating a space in the centre for the vocal to cut through, without needing to reduce the volume of the guitars. NOTE: Stereo Modulator is an AU3 plugin only, not a standalone app. To use it, you will need an audio unit host app such as Garageband or Audiobus.

Screenshots

Stereo Phaser2 screens
Stereo Modulator3 screens

Verdict

The call

The clearest difference is review sentiment: Stereo Modulator at 100% against Stereo Phaser's 0%. Stereo Modulator also leads on rating (5.0 vs 1.0) and update cadence (every 3 months vs every 38 months). Stereo Phaser's advantage is price ($1.99 vs $2.99). On ads, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Stereo Phaser costs $1.99 and Stereo Modulator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Stereo Modulator holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 0% of Stereo Phaser's written reviews are positive against 100% of Stereo Modulator's.

UpkeepUpdate frequency

Stereo Phaser ships an update every 38 months, Stereo Modulator every 3 months. The most recent releases landed on September 20, 2026 and August 30, 2026 respectively.

Scorecard5 real differences · 5 level
Stereo Phaser versus Stereo Modulator: the parameters behind the verdict, then further details
ParameterStereo PhaserStereo Modulator
Price$1.99 — better$2.99
Rating1.0 (1 ratings)5.0 (3 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings13 — better
Update frequencyEvery 38 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.010.0
Further details — not scored
Size10 MB2 MB
Age rating4+4+
DeveloperAleksandar MlazevBlue Mangoo Consulting Company Limited

Customer experience

Stereo Phaser

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Stereo Modulator

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stereo Phaser

No in-app purchases

None

Stereo Modulator

No in-app purchases

Questions

Is Stereo Phaser free?
Stereo Phaser costs $1.99, with no in-app purchases.
Is Stereo Modulator free?
Stereo Modulator costs $2.99, with no in-app purchases.
Which has better reviews, Stereo Phaser or Stereo Modulator?
Stereo Modulator is rated higher. Stereo Phaser averages 1.0 out of 5 from 1 ratings, while Stereo Modulator averages 5.0 from 3 ratings.
Do Stereo Phaser or Stereo Modulator have ads?
Neither Stereo Phaser nor Stereo Modulator shows ads.
Which is updated more often, Stereo Phaser or Stereo Modulator?
Stereo Phaser ships an update every 38 months, and Stereo Modulator every 3 months. Most recently, Stereo Phaser was updated on September 20, 2026 and Stereo Modulator on August 30, 2026.

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