Comparison

Tera 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

Tera Synth

Create unique sounds beyond traditional synthesizers with a modular analog and digital synthesis workstation. Combine physical modeling, wireless patching, and built-in effects for a fat, individual sound. Features a programmable arpeggiator and live playing options.

Highlights
  • Modular analog and digital synthesis
  • Physical modeling modules
  • Wireless patching and modulation routing
  • Built-in distortion, delay, chorus, phaser, and reverb effects
  • Programmable arpeggiator
  • Live playing with onscreen keyboard and MIDI support
  • Audiobus and Inter-App-Audio integration
Read full description

Tera Synth - Modular Analog Synthesizer Explore new sound spaces with Tera Synth that go beyond the emulation of synthesizer legends. Use the power of analog and digital synthesis combined with new modules for physical modelling. Wireless patching of modules combined with an intelligible modulation routing simplifies the development of new synthesizer designs from scratch. Distortion effect, Delay/Chorus/Phaser and Reverb effects give your sounds the final polishing. Tera Synth gives your music an individual character with its unique fat sound. The well-designed algorithms and the economical modular structure provides you with a comparatively high voice yield. Precise timing with the unique built-in Arpeggiator let you feel the rhythm. Tera Synth supports Audiobus and Inter-App-Audio for integration with other Music Apps. Modular Analog Synthesis • Modular synthesizer with free connections between modules. • 25 Sound Modules • 4 Low frequency oscillators • 4 Standard ADSR Envelope generators. • 4 Multi Segment Envelopes with tempo sync. • 64 time/level segments per envelope • Monophonic or polyphonic with up to 32 voices. • More than 920 factory presets, unlimited user presets can be shared. FX • Chorus with four delay lines. • 8 pole Analog Phaser. • Distortion effect with Tube/Tape emulation • Stereo Echo/Delay effect. • Hi end reverberation unit. Live • Play melodies live with the onscreen keyboard. Drag fingers for slides and vibrato. • Optionally use CoreMIDI* compatible hardware keyboard. • Dozens of scales selectable • Variable Keyboard layout for scale optimized playing Full featured programmable 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 Global • Audiobus 3 compatible (Input slot) with Preset saving. • Inter App Audio • AudioUnit AUv3 with parameter automation • Ableton Link compatible • Audio pasteboard. Copy audio recordings to Clipboard for use with other Apps • Exchange user presets with File Sharing in iTunes. • Support for MIDI input/output connections. • MIDI learn functionality.

About

SJ

Features
Currently charting
Read full description

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 Tera Synth's every 4 months. SJ also leads on chart position (#138 vs unranked) and price ($0.49 vs $1.99). Tera 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

Tera 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

Tera Synth ships an update every 4 months, SJ fortnightly. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 7 level
Tera Synth versus SJ: the parameters behind the verdict, then further details
ParameterTera SynthSJ
Price$1.99$0.49 — better
Rating4.8 (27 ratings) — better—
Positive reviews86.4% of reviews—
Number of ratings27 — 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
Size36 MB30 MB
Age rating4+4+
DeveloperHarry GohsKouki Yoshimoto

In-app purchases

None

Tera Synth

No in-app purchases

None

SJ

No in-app purchases

Questions

Is Tera Synth free?
Tera Synth costs $1.99, with no in-app purchases.
Is SJ free?
SJ costs $0.49, with no in-app purchases.
Do Tera Synth or SJ have ads?
Neither Tera Synth nor SJ shows ads.
Which is updated more often, Tera Synth or SJ?
Tera Synth ships an update every 4 months, and SJ fortnightly. Most recently, Tera Synth was updated on October 15, 2026 and SJ on October 14, 2026.

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