Comparison

Stereo Modulator vs Ringotron

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

Ringotron

This app offers advanced control over ring modulation effects for sound design and audio processing. Its multi-band design allows precise manipulation of the audio spectrum, with a special soft mode to reduce unwanted intermodulation. It can also function as a resonant filter that smoothly transitions into a ring modulator.

Highlights
  • Parallel ring modulator units
  • Stereo separation control
  • Ultra-narrow band resonance
  • Ribbon controls for frequencies
  • Modulation system for band centers
  • Tempo syncing for oscillators
  • Soft limiter and clipper
Features
Read full description

Ringotron allows taming the strong transformational effects of traditional ring modulation, opening up a wider range of possibilities in sound design and audio FX. Its multi-band design enables fine control over which parts of the spectrum will be transformed by the effect. A special soft mode is available that borrows concepts from feedback modeling, which can be used to reduce intermodulation effects that are often a limiting factor in the more general applicability of ring modulators. In addition to the layers of control they provide, combination of these core features also allows the plugin to act as a stereo, multi-peak resonant filter that can also smoothly morph into a ring modulator. FEATURES: • 2 parallel ring modulator units (max. modulator frequency: 8 kHz) • Stereo separation can be added to band center, mod. frequency, mod. phase • Ultra-narrow bands can be used to create highly resonant sounds • 4 large ribbon controls for band center and modulator frequencies • Band center frequencies can be modulated by the built-in modulation system • Tempo syncing can be independently configured for each oscillator • Built-in soft limiter and clipper to protect against volume spikes IMPORTANT INFORMATION: The plugin comes with a zero-latency, non-brickwall soft limiter, and as such, its stopping power is limited. Make sure to always leave enough headroom or use an external brickwall limiter for total protection against powerful transients. Alternatively, a built-in soft clipper is also available. PLEASE NOTE: • AUv3-compatible host app is required • Suported sampling rates: 44.1, 48, 96 kHz

Screenshots

Stereo Modulator3 screens
Ringotron2 screens

Verdict

The call

The clearest difference is update cadence: Stereo Modulator at every 3 months against Ringotron's every 20 months. Stereo Modulator also leads on price ($2.99 vs $8.99) and iOS requirement (10.0 vs 14.0). Ringotron's advantage is ratings volume (15 vs 3). On rating, review sentiment, 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

Stereo Modulator costs $2.99 and Ringotron $8.99 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 Stereo Modulator against 5.0 for Ringotron. That said, the two scores are not equally well evidenced: Ringotron has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Stereo Modulator ships an update every 3 months, Ringotron every 20 months. The most recent releases landed on August 30, 2026 and August 29, 2026 respectively.

Scorecard4 real differences · 6 level
Stereo Modulator versus Ringotron: the parameters behind the verdict, then further details
ParameterStereo ModulatorRingotron
Price$2.99 — better$8.99
Rating5.0 (3 ratings)5.0 (15 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings315 — better
Update frequencyEvery 3 months — betterEvery 20 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better14.0
Further details — not scored
Size2 MB4 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company Limitedquantovox

Customer experience

Stereo Modulator

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

Ringotron

All ratings15 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Stereo Modulator

No in-app purchases

None

Ringotron

No in-app purchases

Questions

Is Stereo Modulator free?
Stereo Modulator costs $2.99, with no in-app purchases.
Is Ringotron free?
Ringotron costs $8.99, with no in-app purchases.
Which has better reviews, Stereo Modulator or Ringotron?
Stereo Modulator and Ringotron are both rated 5.0 out of 5 on the App Store, from 3 and 15 ratings respectively.
Do Stereo Modulator or Ringotron have ads?
Neither Stereo Modulator nor Ringotron shows ads.
Which is updated more often, Stereo Modulator or Ringotron?
Stereo Modulator ships an update every 3 months, and Ringotron every 20 months. Most recently, Stereo Modulator was updated on August 30, 2026 and Ringotron on August 29, 2026.

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