LogSynth vs KG
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LogSynth
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LogSynth is a polyphonic virtual-analog synthesizer built for people who care what's actually happening in the signal path, not just what the preset browser looks like. Every voice runs five anti-aliased oscillators (sine, triangle, saw, pulse with PWM, and a band-limited impulse train) plus a dedicated sub-oscillator and noise source, mixed per-voice with independent amp envelopes. Chunky oscillators, crisp effects and a zero-delay-feedback state-variable filter — switchable low/high/bandpass. The drive effect is powered by a physically modeled diode circuit, numerically integrated rather than a lookup-table approximation, so pushing it into saturation behaves the way an actual analog drive would. FEATURES - 8-voice polyphony, 5 oscillators + sub + noise per voice - Zero-delay-feedback state-variable filter with resonant feedback and diode drive saturation - 5 independent oscillator envelopes plus a dedicated filter envelope - 2 assignable LFOs and an 8-slot modulation matrix - Built-in chorus, delay, FDN reverb, and 4-mode distortion - 41 factory presets across Bass, Lead, Pluck, and Effects - One-tap patch randomizer with adjustable intensity - Real-time oscilloscope, on-screen keyboard, and CoreMIDI input - Runs standalone or as an AUv3 instrument inside AU hosts Whether you're sound designing from scratch or dropping it into a DAW as a plugin, Logsynth gives you the same engine everywhere — no watered-down mobile version, no feature gating between standalone and plugin modes.
KG
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KKG-SQUARE Pro is a landscape-first virtual analog synthesizer for iPhone. Classic panel layout, cool charcoal chassis, and a sharp cyan accent—built to feel like hardware you can play anywhere. Features 4-oscillator virtual analog engine Filter, filter envelope, amp envelope, and LFO Chorus, delay, and reverb with per-effect on/off and depth Arpeggiator and step sequencer Hold, portamento, and tempo-linked performance modes Full-width playable keyboard with octave shift MIDI input support Built-in voice presets Make bass, leads, pads, and evolving textures—fast—without leaving your phone.
Screenshots
Verdict
The clearest difference is price: KG at $0.49 against LogSynth's $9.99. LogSynth's advantage is iOS requirement (18.0 vs 26.5). On update cadence, 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
LogSynth costs $9.99 and KG $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.
LogSynth ships an update every 2 weeks, KG every 11 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.
| Parameter | LogSynth | KG |
|---|---|---|
| Price | $9.99 | $0.49 — better |
| Update frequency | Every 2 weeks | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 — better | 26.5 |
| Further details — not scored | ||
| Size | 22 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | SEAN IAN HALENWOOD | Kouki Yoshimoto |
In-app purchases
LogSynth
No in-app purchases
KG
No in-app purchases









