Comparison

SX1000 vs QuadroSphere

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

Head to head
About

SX1000

This app faithfully emulates a vintage analog synthesizer, offering musicians hands-on control. It expands upon the original with polyphonic mode, a sub-oscillator, and integrated effects.

Highlights
  • Faithful emulation of JEN SX1000
  • Polyphonic mode
  • Sub-oscillator (-3 octaves)
  • Integrated arpeggiator
  • Four flexible effects
  • AUv3 and Standalone support
Features
Read full description

SX1000 is a faithful emulation of the JEN SX1000, a vintage Italian synth released in 1978. The SX1000 was one of the earliest affordable analog synthesizers, designed for musicians seeking hands-on control without breaking the bank. We have carefully emulated the SX1000’s M110 chip, and also expanded its capabilities by adding features like polyphonic mode, a sub-oscillator (down to -3 octaves), and additional controls for legato modes. We’ve also integrated an arpeggiator borrowed from a vintage classic polysynth and enhanced the sonic possibilities with four effects featuring flexible routing. Available as AUv3 and Standalone.

About

QuadroSphere

This audio plugin allows musicians to sculpt immersive soundscapes by controlling stereo placement and effects across four distinct frequency bands. Create dynamic, atmospheric audio with automated movement and morphing between saved settings.

Highlights
  • 4 configurable frequency bands
  • Control stereo separation, level, and pan per band
  • Create and morph between 12 snapshots
  • Modulation control for automated sweeps
  • Per-band effects (Haas, Delay, Reverb, Chorus, Compressor)
  • Convert mono to pseudo-stereo
  • MIDI CC control
Features
Read full description

QuadroSphere is a great tool for bringing an instrument to life by creating a soundscape with a constantly moving sound source. QuadroSphere splits the incoming audio signal into 4 distinct coloured frequency bands using the frequency bar. Each band has an associated coloured sphere allowing you to control the pan, stereo separation and volume level. You can use this plugin as a way to impose subtle control over stereo placement with little or no movement, or go crazy with random automation. Adding effects such as reverb or delay on a specific frequency band can help create a lush atmospheric swirling which surrounds the listener. This is great for musicians trying to create minimalistic ambient or tranquil soundscapes. You can create up to 12 snapshots of the sphere parameters and effect settings, then morph between them at a designated speed (measured in beats). You can also enable continuous randomization mode, and have full control over which spheres and control which parts are automated. You can also use QuadroSphere as a stereo splitter, using the additional outputs to add your own effects to band outputs. Key Features: ○ 4 Configurable frequency bands. ○ Control stereo separation, level and pan for each band. ○ Create up to 12 Snapshots. ○ Morph between various panning, width and frequency band levels. ○ Modulation control for automated sweeps around pan center. ○ Convert MONO signals into a pseudo-stereo image. ○ Per band Haas, Delay, Reverb, Chorus and Compressor. ○ Allows combined and individual per-band audio outputs. ○ Continuous randomized morphing of the stereo field. ○ Built in Preset Manager with drag and drop support. ○ Power and Solo for each band. ○ Controlable morph speeds. ○ Various animated transition modes. ○ Access most options using AU parameters or MIDI CC control.

Screenshots

SX10003 screens
QuadroSphere4 screens

Verdict

The call

The clearest difference is price: QuadroSphere at $6.99 against SX1000's $19.99. QuadroSphere also leads on update cadence (every 3 weeks vs every 12 months) and review sentiment (100% vs 91%). 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

SX1000 costs $19.99 and QuadroSphere $6.99 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 SX1000 against 5.0 for QuadroSphere. Both are backed by a comparable volume of ratings — 10 and 10 respectively. Written reviews are what separate them: 91% of SX1000's written reviews are positive against 100% of QuadroSphere's.

UpkeepUpdate frequency

SX1000 ships an update every 12 months, QuadroSphere every 3 weeks. The most recent releases landed on November 4, 2026 and November 11, 2026 respectively.

Scorecard4 real differences · 6 level
SX1000 versus QuadroSphere: the parameters behind the verdict, then further details
ParameterSX1000QuadroSphere
Price$19.99$6.99 — better
Rating5.0 (10 ratings)5.0 (10 ratings)
Positive reviews90.9% of reviews100.0% of reviews — better
Number of ratings1010
Update frequencyEvery 12 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size30 MB18 MB
Age rating4+4+
DeveloperAudioThing Ltd.4Pockets.com

Customer experience

SX1000

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive90.9%
Neutral9.1%
Negative0.0%

QuadroSphere

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SX1000

No in-app purchases

None

QuadroSphere

No in-app purchases

Questions

Is SX1000 free?
SX1000 costs $19.99, with no in-app purchases.
Is QuadroSphere free?
QuadroSphere costs $6.99, with no in-app purchases.
Which has better reviews, SX1000 or QuadroSphere?
SX1000 and QuadroSphere are both rated 5.0 out of 5 on the App Store, from 10 and 10 ratings respectively.
Do SX1000 or QuadroSphere have ads?
Neither SX1000 nor QuadroSphere shows ads.
Which is updated more often, SX1000 or QuadroSphere?
SX1000 ships an update every 12 months, and QuadroSphere every 3 weeks. Most recently, SX1000 was updated on November 4, 2026 and QuadroSphere on November 11, 2026.

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