PD1 vs Marco Synth
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PD1
This app simulates classic analog delay pedals, offering a meaner grit with a ladder filter and random delay-line noise. It's an audio-unit effect designed for musicians seeking unique delay sounds.
- Analog delay simulation
- Ladder filter for meaner grit
- Random delay-line noise
- Audio-unit effect plugin
- Classic pedal sound recreation
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PD-1 is an analog delay simulation audio plug-in and app that recreates the sounds of classic analog delay pedals with the twist of significantly meaner girt from a ladder filter and random delay-line noise.
Marco Synth
This powerful synthesizer app offers a unique dual hard sync engine with four independent oscillators. Explore a vast sonic palette with intelligent randomization and a tactile workflow designed for sound discovery. It's suitable for both beginners and experienced musicians.
- Dual hard sync engine
- Four independent oscillators
- Intelligent randomization
- Extensive waveform and filter options
- Master FX bus
- AUv3 plugin support
- Built-in keyboard
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Marco is a powerful 4-oscillator synth built around dual hard sync, with independent shaping on every oscillator. Randomize to spark fresh ideas, then tweak to shape them - a fast, tactile workflow made for finding your own sounds, not just recalling presets. Marco is a new kind of synthesizer built around three breakthrough ideas: • Dual Hard Sync - two parallel hard-sync chains running side by side • Four oscillators, each with its own signal shaping path • Intelligent randomization and tweak system The result is shimmering harmonics, screaming overtones, and evolving timbres no other iOS synth can give you. Whether it's your first synth or your fortieth, Marco meets you where you are. Hit the dice for an instant new sound. Cycle through every valid Dual Hard Sync combination with one tap. Or dive deep into per-oscillator sound design when you're ready. DUAL HARD SYNC • Two parallel hard-sync chains - A, B, or free per oscillator • One-tap cycling through every valid Dual Hard Sync combination • 10 Signature presets built around Dual Hard Sync FOUR INDEPENDENT OSCILLATORS • Waveforms: sine, triangle, saw, ramp, pulse, noise • Filters: LP 6/12/18/24, BP, HP, Notch, Formant • Envelopes: VCA + Filter, linear or exponential, drone mode • LFOs: filter, volume, wavefold, pitch - with phase, reset, fade and clock sync • Glide: exponential, linear, log, S-curve, legato • Master FX bus with drive, compressor, delay, reverb, stereo width and limiter • Hard sync and wavefolding • Link envelopes, filters, LFOs, glide or effects across oscillators when wanting traditional shaping • Monophonic sounds usually only possible in large modular setups INTELLIGENT RANDOMISATION • Musical preset generator - usable sounds, not chaos • Generate by style: Mild, Wild and Recipe • Target by category: Bass, Lead, Pad, Keys, FX, Drone • Tweak system for subtle, context-aware variations • One-tap dice button for instant inspiration EFFORTLESS WORKFLOW • Consistent UI across all four oscillators • Per-oscillator scopes with live visual feedback • Live LFO indicators on every modulated parameter • Expressive XY pad • Built-in keyboard on iPad standalone BUILT FOR REAL MUSIC • 100+ presets, including 10 Signature sounds • Preset import / export • Master Preset import / export • Deep MIDI: full Note + CC mapping (CC mapping AUv3 only) • Dedicated MIDI for Random Generate, Tweak, Dual Hard Sync Cycle, Scope, Preset Browser, XY Pad (AUv3 only) • Clock-synced LFOs lock to host tempo • AUv3 plugin - works in AUM, Loopy Pro, Drambo, Logic Pro, GarageBand, Cubasis and more • Built-in song player with public domain tracks (standalone only)
Screenshots
Verdict
The clearest difference is price: PD1 at $3.99 against Marco Synth's $4.99. On review sentiment, update cadence, 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
PD1 costs $3.99 and Marco Synth $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PD1 ships an update every 6 days, Marco Synth weekly. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.
| Parameter | PD1 | Marco Synth |
|---|---|---|
| Price | $3.99 — better | $4.99 |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 6 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.5 — better | 17.6 |
| Further details — not scored | ||
| Size | 10 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Pedro Yamada | Glenn Vassallo |
Customer experience
PD1
Marco Synth
In-app purchases
PD1
No in-app purchases
Marco Synth
No in-app purchases








