Comparison

Stereo Width Control vs Spatializer

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

Head to head
About

Stereo Width Control

This audio plugin allows precise control over the stereo width of audio across four adjustable frequency bands. It's designed for mastering engineers to manage bass frequencies while maintaining a wide stereo image in other ranges. Features include solo controls for each band and a visual vectorscope.

Highlights
  • Adjustable stereo width per frequency band
  • Four independent frequency bands
  • Solo control for each band
  • Stereo vectorscope visualization
  • Runs inside host apps like GarageBand
Features
Read full description

Stereo Width Control is an Audio Unit plugin that allows you to increase or decrease the stereo width of 4 adjustable frequency bands. Mastering engineers use it to ensure that the bass frequencies of the kick drum and bass instruments stay tightly focused in the centre channel while a keeping spacious stereo image in the mid range frequencies. Stereo Width Control operates with your choice of 1 to 4 separate bands. Each band has a solo control, used to audition that band on its own while you adjust its frequency range and stereo width setting. In the lower right is a stereo vectorscope graph that is helpful for visualising the volume and stereo width of your tracks. NOTE: This app is an Audio Unit plugin that runs inside of host apps such as GarageBand. It does not process audio in standalone mode.

About

Spatializer

Enhance audio with stereo widening that preserves mono compatibility and avoids phase issues. This tool synthesizes side channel information, ideal for mono sources or adding depth to existing stereo tracks without compromising the mid channel.

Highlights
  • Stereo widening without phase smearing
  • Synthesizes side channel information
  • Preserves mid channel integrity
  • Flexible for mono and stereo sources
  • Transparent or strong effect options
  • Multiband transient shapers
  • Directional RMS distribution visualization
Features
Read full description

Spatializer is a great choice if you want to widen your sounds but need to avoid: • phase smearing in the mono mix • phasing / comb filter effects (from asymmetric channel delays) • or any changes to the mid channel or mono mix The plugin's main focus is to enhance sounds that have little or no side channel information, where traditional widening approaches like mid-side processing can't be effectively used. It also offers more flexibility in case of mixed inputs, widening narrow components without boosting already existing stereo width to extreme levels that would drown out the mid channel, leading to stereo image problems. Spatializer can also be combined with other effects, for example it's excellent for augmenting large-scale reverbs by enhancing the more immediate space or effectively moving the listener closer to the virtual sound source. At large timescales, the plugin takes on some of the qualities of a reverb itself, while keeping the mid channel sharp and free of any reflections. This could either be used as a special effect in and of itself (depending on the transient characteristics of the input), or be blended together with traditional ambience or acoustic space simulation effects. FEATURES: • Synthesis of side channel information where there was none (stereoization of mono sources) • Linear phase mid channel • Capability to deliver both a neutral / transparent response as well as stronger effects • Built-in multiband transient shapers for delivering a more focused response by suppressing outlier reflections • Multiple visualization options: Directional RMS distribution, position and motion • Effects can range from close-proximity / spatial audio effects to larger acoustic space reflections • Baseline frequency response is optimized to maximize flatness, balancing the spectral density of Left, Right, Side channels The built-in selection of subtly tuned presets and the combined psychoacoustic properties of the above features give more leeway to easily experiment with kinds of source material that have traditionally presented difficulties, like tracks with prominent LF content. Due to its ability to provide transparent, subtle and high-clarity responses, as well as good spectral density characteristics, Spatializer can also be included in master bus effects chains. In multi-track setups it can be used in parallel with other positioning methods to bring more variation to the sound stage or to provide additional ways to adjust the mix. For audio demos, visit: www.quantovox.com/sp PLEASE NOTE: • AUv3-compatible host application required • Supported sampling rates: 22.05, 44.1, 48, 96 kHz.

Screenshots

Stereo Width Control4 screens
Spatializer2 screens

Verdict

The call

The clearest difference is update cadence: Spatializer at every 2 months against Stereo Width Control's every 12 months. Stereo Width Control's advantage is price ($5.99 vs $9.99) and rating (5.0 vs 4.8). On ratings volume, ads, in-app purchases and monetization model 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 Width Control costs $5.99 and Spatializer $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Stereo Width Control holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 12 and 27 respectively. Written reviews point the same way: 100% of Stereo Width Control's written reviews are positive against 91% of Spatializer's.

UpkeepUpdate frequency

Stereo Width Control ships an update every 12 months, Spatializer every 2 months. The most recent releases landed on September 24, 2026 and September 27, 2026 respectively.

Scorecard5 real differences · 5 level
Stereo Width Control versus Spatializer: the parameters behind the verdict, then further details
ParameterStereo Width ControlSpatializer
Price$5.99 — better$9.99
Rating5.0 (12 ratings) — better4.8 (27 ratings)
Positive reviews100.0% of reviews — better90.9% of reviews
Number of ratings1227 — better
Update frequencyEvery 12 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better12.1
Further details — not scored
Size3 MB13 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company Limitedquantovox

Customer experience

Stereo Width Control

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Spatializer

All ratings27 ratings
Positive96.3%
Neutral0.0%
Negative3.7%
Written reviews11 reviews
Positive90.9%
Neutral9.1%
Negative0.0%

In-app purchases

None

Stereo Width Control

No in-app purchases

None

Spatializer

No in-app purchases

Questions

Is Stereo Width Control free?
Stereo Width Control costs $5.99, with no in-app purchases.
Is Spatializer free?
Spatializer costs $9.99, with no in-app purchases.
Which has better reviews, Stereo Width Control or Spatializer?
Stereo Width Control is rated higher. Stereo Width Control averages 5.0 out of 5 from 12 ratings, while Spatializer averages 4.8 from 27 ratings.
Do Stereo Width Control or Spatializer have ads?
Neither Stereo Width Control nor Spatializer shows ads.
Which is updated more often, Stereo Width Control or Spatializer?
Stereo Width Control ships an update every 12 months, and Spatializer every 2 months. Most recently, Stereo Width Control was updated on September 24, 2026 and Spatializer on September 27, 2026.

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