PD1 vs Fishtail
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.
Fishtail
This app generates complete musical forms using algorithmic composition based on music theory. Users can shape, perform, and rearrange these compositions, routing seven musical channels to their chosen instruments via MIDI. It offers extensive control over keys, modes, and expressive elements.
- Algorithmic music generation
- Multi-section compositions
- Seven-channel MIDI output
- Retain, reorder, and perform Takes
- Multiple intonation systems
- AUv3 MIDI plug-in support
- Ableton Link integration
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Fishtail is a generative MIDI instrument for iPhone and iPad. It composes complete musical forms, then lets you shape, perform, retain and rearrange them! Explore six composers, including Lumière’s evolving modal colour and Ritual Engine’s rhythmic energy. Roll D7 for a shaped recipe, then Generate and edit it. Fishtail does not use AI to generate music. Its musical output is created through algorhythmic generation grounded in musical theory. Build pieces from sections with independent keys, modes, meters, cadences and expressive treatments. Generate distinct Takes, compare them, reorder them and hand the next Take over at a natural whole-piece boundary. Fishtail produces MIDI rather than sound. Use it standalone or as an AUv3 MIDI plug-in, and route its seven musical channels to the instruments you choose. Ableton Link supports shared tempo and transport. Features: • Complete multi-section generative compositions • Seven-channel MIDI output • Retain, reorder and perform Takes • Seven intonation systems • Normal MIDI, pitch-bend and MPE output • MTS output • Ableton Link • .fishtail project save and recall • Standard MIDI and per-channel export • Experimental analogue CV file packages • Accessible light and dark interfaces No account, advertising, analytics or tracking. Tested in AUM
Screenshots
Verdict
The clearest difference is review sentiment: PD1 at 100% against Fishtail's 50%. PD1 also leads on price ($3.99 vs $14.99). On update cadence, 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
PD1 costs $3.99 and Fishtail $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PD1 ships an update every 6 days, Fishtail every 3 days. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.
| Parameter | PD1 | Fishtail |
|---|---|---|
| Price | $3.99 — better | $14.99 |
| Rating | — | 4.4 (7 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | Every 6 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.5 | 17.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | Pedro Yamada | AMY NICOLA MCBRIDE |
Customer experience
PD1
Fishtail
In-app purchases
PD1
No in-app purchases
Fishtail
No in-app purchases








