Comparison

SyndtSphere vs QuadroSphere

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

Head to head
About

SyndtSphere

Explore a novel approach to sound design with this synthesizer. Rotate a sphere with over 70 presets to discover ideal sounds, enhanced by a stereo ping-pong delay and global settings. It's AUv3 compatible for use within other music production apps.

Highlights
  • Spherical sound exploration
  • AUv3 plugin compatibility
  • High-quality audio engine
  • Stereo ping-pong delay
  • Legato mode with glide
Features
Read full description

This synthesizer offers a brand new way of finding the optimal sound. By rotating a sphere that consists of more than 70 professionally created states anyone can dial in the perfect sound. In addition to the sphere, a ping-pong delay and a few more global settings are available. SyndtSphere is based on the more traditional polyphonic synthesizer Syndt (also available on the App Store). A video demo is available at the developers website. Features: • AUv3 Compatible - use it as a plugin inside Garageband or any other AUv3 compatible host app. • High quality internal audio engine. • Stereo ping-pong delay • Optional legato mode with glide speed setting. Feedback or suggestions? Drop us a mail: support(at)klevgrand.se or @klevgrand on Twitter

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
Currently charting
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

SyndtSphere4 screens
QuadroSphere4 screens

Verdict

The call

The clearest difference is review sentiment: QuadroSphere at 100% against SyndtSphere's 40%. QuadroSphere also leads on rating (5.0 vs 3.7) and update cadence (every 3 weeks vs every 23 months). SyndtSphere's advantage is price ($1.99 vs $14.99). 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

SyndtSphere costs $1.99 and QuadroSphere $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

QuadroSphere holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 18 and 10 respectively. Written reviews point the same way: 40% of SyndtSphere's written reviews are positive against 100% of QuadroSphere's.

UpkeepUpdate frequency

SyndtSphere ships an update every 23 months, QuadroSphere every 3 weeks. The most recent releases landed on October 9, 2026 and October 8, 2026 respectively.

Scorecard5 real differences · 6 level
SyndtSphere versus QuadroSphere: the parameters behind the verdict, then further details
ParameterSyndtSphereQuadroSphere
Price$1.99 — better$14.99
Rating3.7 (18 ratings)5.0 (10 ratings) — better
Positive reviews40.0% of reviews100.0% of reviews — better
Number of ratings18 — better10
Update frequencyEvery 23 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#194 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size15 MB18 MB
Age rating4+4+
DeveloperKlevgrand Produkter AB4Pockets.com

Customer experience

SyndtSphere

All ratings18 ratings
Positive66.7%
Neutral5.6%
Negative27.8%
Written reviews15 reviews
Positive40.0%
Neutral20.0%
Negative40.0%

QuadroSphere

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

In-app purchases

None

SyndtSphere

No in-app purchases

None

QuadroSphere

No in-app purchases

Questions

Is SyndtSphere free?
SyndtSphere costs $1.99, with no in-app purchases.
Is QuadroSphere free?
QuadroSphere costs $14.99, with no in-app purchases.
Which has better reviews, SyndtSphere or QuadroSphere?
QuadroSphere is rated higher. SyndtSphere averages 3.7 out of 5 from 18 ratings, while QuadroSphere averages 5.0 from 10 ratings.
Do SyndtSphere or QuadroSphere have ads?
Neither SyndtSphere nor QuadroSphere shows ads.
Which is updated more often, SyndtSphere or QuadroSphere?
SyndtSphere ships an update every 23 months, and QuadroSphere every 3 weeks. Most recently, SyndtSphere was updated on October 9, 2026 and QuadroSphere on October 8, 2026.

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