Comparison

Stereo Modulator vs jAmp IR

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

Head to head
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.

About

jAmp IR

This tool loads impulse responses for guitar and bass amp cabinet simulation. It allows mixing two impulse responses and offers fine control over filters, gain, and phase. The app includes five high-quality impulse responses.

Highlights
  • Impulse response loader
  • Cabinet simulator for guitar and bass
  • Mix two impulse responses
  • High and low pass filters
  • Gain control
  • Phase inversion
Features
Read full description

jAmp IR is a zero latency impulse response loader tool in AUv3 plugin format. It is designed to be a cabinet simulator for guitar and bass amps. Two impulse responses can be mixed. Furthermore there is fine level control in the form of high and low pass filters, gain control, and phase inversion. The app comes with 5 high quality impulse responses.

Screenshots

Stereo Modulator3 screens
jAmp IR1 screens

Verdict

The call

The clearest difference is price: jAmp IR at Free against Stereo Modulator's $2.99. jAmp IR also leads on update cadence (every 2 weeks vs every 3 months) and ratings volume (15 vs 3). Stereo Modulator's advantage is review sentiment (100% vs 67%) and rating (5.0 vs 4.7). On ads, in-app purchases 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

jAmp IR is free to download; Stereo Modulator costs $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 4.7. That said, the two scores are not equally well evidenced: jAmp IR has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 100% of Stereo Modulator's written reviews are positive against 67% of jAmp IR's.

UpkeepUpdate frequency

Stereo Modulator ships an update every 3 months, jAmp IR every 2 weeks. The most recent releases landed on August 30, 2026 and September 27, 2026 respectively.

Scorecard7 real differences · 3 level
Stereo Modulator versus jAmp IR: the parameters behind the verdict, then further details
ParameterStereo ModulatorjAmp IR
Price$2.99Free — better
Rating5.0 (3 ratings) — better4.7 (15 ratings)
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings315 — better
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS10.0 — better14.0
Further details — not scored
Size2 MB1 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company LimitedJan Maes

Customer experience

Stereo Modulator

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

jAmp IR

All ratings15 ratings
Positive93.3%
Neutral0.0%
Negative6.7%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Stereo Modulator

No in-app purchases

None

jAmp IR

No in-app purchases

Questions

Is Stereo Modulator free?
Stereo Modulator costs $2.99, with no in-app purchases.
Is jAmp IR free?
jAmp IR is free to download, with no in-app purchases.
Which has better reviews, Stereo Modulator or jAmp IR?
Stereo Modulator is rated higher. Stereo Modulator averages 5.0 out of 5 from 3 ratings, while jAmp IR averages 4.7 from 15 ratings.
Do Stereo Modulator or jAmp IR have ads?
Neither Stereo Modulator nor jAmp IR shows ads.
Which is updated more often, Stereo Modulator or jAmp IR?
Stereo Modulator ships an update every 3 months, and jAmp IR every 2 weeks. Most recently, Stereo Modulator was updated on August 30, 2026 and jAmp IR on September 27, 2026.

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