Comparison

Cube Synth vs SJ

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

Head to head
About

Cube Synth

Explore additive synthesis with intuitive sound morphing and deep parameter control. Create complex soundscapes, vocal phrases, or rhythms with ease. Offers a unique randomizer for instant patch generation.

Highlights
  • Additive synthesis engine
  • Intelligent sound morphing
  • Over 400 sound presets
  • Programmable arpeggiator
  • Multiple built-in effects
  • Audiobus and Inter-app audio support
  • Random sound patch generator
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Cube Synth is a groundbreaking new software instrument giving you the power and flexibility of additive synthesis together with easy editing and morphing capabilities. Macro parameters allow you to control this beast with unequalled ease. Intelligent sound morphing capabilities enables you to easily create complex evolving sound scapes, vocal phrases or stunning rhythms simply by choosing up to four sound sources from a predefined set. Then add one of the predefined envelopes and a unique, complex sound preset containing thousands of parameters is created! If you want to dive deeper into the inner secrets of this synthesis monster you can manipulate each parameter individually to get precise control over the sound. A number of high level parameters such as Brightness and Harmonic spread control hundreds of synthesis parameters in a way modeled after the inner workings of natural instruments. Cube Synth gives you also a new method of getting randomly generated sound patches in a way you never experienced before: roll the dice! Every single try gives you a new unique sound patch, really every try, promised… Synthesis • over 400 sound presets • four morphable sound sources • up to 512 partials per voice • harmonic/inharmonic spectra • arbitrary noise spectra • morphable filter banks • 3 Envelopes with tempo sync • 64 time/level segments per envelope Arpeggiator • Uses programmable sequences with up to 32 steps.  • Can trigger single notes and chords. • Unique randomizer generates Arpeggios with 100% usability. • 32 Arpeggios included, unlimited useer arpeggios possible. • For each step you can program tie, accent, transposition and note order Effects • Chorus • Phaser • Overdrive • Ensemble • Echo/Delay • Reverb Global • Audiobus 2 compatible (Input slot) with state saving • Support for Ableton Link. • Inter-app audio compatible (Instrument/Generator) • CoreMIDI / Virtual MIDI • Audio recorder with Metronome. • Upload to SoundCloud and File Export. • Audio pasteboard.

About

SJ

Features
Currently charting
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SJ-SQUARE is a Super Jupiter–inspired analog polyphonic synthesizer for iPhone. A warm brown chassis and amber glow meet a hands-on module layout: oscillators, filter, envelopes, LFO, and effects — built for playing, not menus. FEATURES • Multi-oscillator panel with wave, octave, and level controls • Filter with resonance, envelope intensity, and key tracking • Filter envelope & amp controls for expressive shaping • LFO, OSC 2 detune / live layer, chorus, delay, and reverb • Unison (1–4 voices), tempo / tap, and scale snap • Full on-screen keyboard with octave shift & range minimap • MIDI input support for external controllers • Built-in presets ready to play • Landscape-optimized performance UI Craft rich pads, biting leads, and stacked unison tones. Tweak cutoff and envelopes in real time, then perform with the keyboard or your MIDI gear. From the maker of KG-SQUARE, JP-SQUARE, and DX-SQUARE — hardware-inspired synth apps for musicians who love hands-on sound design.

Screenshots

SJ1 screens

Verdict

The call

The clearest difference is update cadence: SJ at fortnightly against Cube Synth's every 4 months. SJ also leads on chart position (#138 vs unranked) and price ($0.49 vs $1.99). Cube Synth's advantage is iOS requirement (12.0 vs 26.5). 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

Cube Synth costs $1.99 and SJ $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Cube Synth ships an update every 4 months, SJ fortnightly. The most recent releases landed on September 27, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 7 level
Cube Synth versus SJ: the parameters behind the verdict, then further details
ParameterCube SynthSJ
Price$1.99$0.49 — better
Rating4.7 (16 ratings) — better—
Positive reviews89.5% of reviews—
Number of ratings16 — better—
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
Best chart rank—#138 — better
DevicesiPadiPhone, iPad — better
Requires iOS12.0 — better26.5
Further details — not scored
Size19 MB30 MB
Age rating4+4+
DeveloperHarry GohsKouki Yoshimoto

In-app purchases

None

Cube Synth

No in-app purchases

None

SJ

No in-app purchases

Questions

Is Cube Synth free?
Cube Synth costs $1.99, with no in-app purchases.
Is SJ free?
SJ costs $0.49, with no in-app purchases.
Do Cube Synth or SJ have ads?
Neither Cube Synth nor SJ shows ads.
Which is updated more often, Cube Synth or SJ?
Cube Synth ships an update every 4 months, and SJ fortnightly. Most recently, Cube Synth was updated on September 27, 2026 and SJ on October 14, 2026.

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