Comparison

PD1 vs Fishtail

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

Head to head
About

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.

Highlights
  • Analog delay simulation
  • Ladder filter for meaner grit
  • Random delay-line noise
  • Audio-unit effect plugin
  • Classic pedal sound recreation
Features
Read full description

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.

About

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.

Highlights
  • 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
Features
Read full description

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

PD12 screens
Fishtail3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

PD1 costs $3.99 and Fishtail $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
PD1 versus Fishtail: the parameters behind the verdict, then further details
ParameterPD1Fishtail
Price$3.99 — better$14.99
Rating—4.4 (7 ratings) — better
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings—7 — better
Update frequencyEvery 6 daysEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.517.0 — better
Further details — not scored
Size10 MB37 MB
Age rating4+4+
DeveloperPedro YamadaAMY NICOLA MCBRIDE

Customer experience

PD1

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Fishtail

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

PD1

No in-app purchases

None

Fishtail

No in-app purchases

Questions

Is PD1 free?
PD1 costs $3.99, with no in-app purchases.
Is Fishtail free?
Fishtail costs $14.99, with no in-app purchases.
Do PD1 or Fishtail have ads?
Neither PD1 nor Fishtail shows ads.
Which is updated more often, PD1 or Fishtail?
PD1 ships an update every 6 days, and Fishtail every 3 days. Most recently, PD1 was updated on October 15, 2026 and Fishtail on October 25, 2026.

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