App Overview

GRDelay icon

GRDelay

Rob Jackson · Music

grdelay - granular random delay plugin (auv3)

$1.99 · In-app purchases

PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
5.0
2 ratings · Top 5%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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What's included17 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

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Rork plan preview for GRDelay: map the core Music workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Enhance with curated playlists and user-generated effects.

Assumption to check: Limited song selection and effects library

Validate with people who use this workflow before building.

Hypothesis 2

Implement more robust audio handling and feedback.

Assumption to check: Playback controls are often unresponsive

Validate with people who use this workflow before building.

Hypothesis 3

Simplify the subscription model and clarify benefits.

Assumption to check: In-app purchases can be confusing

Validate with people who use this workflow before building.

Hypothesis 4

Integrate social sharing to allow users to share playlists and effects.

Assumption to check: Lack of social sharing features

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

grdelay - granular random delay plugin (auv3) grdelay is an audio effect plugin that can run standalone, or in any au compatible host application such as logic pro or garageband. overview - what's a granular random delay? grdelay is a randomised delay effect that uses a similar approach to granular synthesis to generate sound. in grdelay, up to 16 "grains" of stereo sound are created in realtime from delayed copies of the input audio, with control over the grain shape and delay time. there are also options to pitch-shift grains up an octave, and cascade the output from one grain into another. shape, delay time and pitch-shifting can all be randomised to create some really unusual effects and textures. while grdelay can produce sounds similar to existing pitch-shifted delays and even shimmer effects, the design is totally original, and to the best of my knowledge, quite sonically unique. i think grdelay is really one of those effects you need to hear to believe, so please do check out the reviews and demos online. please note, because there's a "whole lot of random going on" in grdelay, it's not a good choice if you want a delay that can do tempo / clock-sync'd rhythmic delays. perhaps take a look at polydelay which offers tempo sync to host and musical note length delay times. for more info and support please visit: www.waverley-instruments.com/robjackson

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

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BUILD KIT DIFFICULTY
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From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.