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.
App Overview
ScratchBud Vinyl Scratching FX
ScratchBud makes it easy to bring the feel of vinyl scratching to your iOS or Apple Silicon device
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
14 ratings · Top 15%
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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included19 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for ScratchBud Vinyl Scratching FX: 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
Offer more unique effects and customization options.
Assumption to check: Limited effects selection compared to desktop software
Validate with people who use this workflow before building.
Hypothesis 2
Integrate social sharing to showcase creations.
Assumption to check: No community sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Implement high-quality audio processing options.
Assumption to check: Audio quality may vary on different devices
Validate with people who use this workflow before building.
Hypothesis 4
Provide a comprehensive onboarding tutorial and user guides.
Assumption to check: Limited tutorial support
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
ScratchBud makes it easy to bring the feel of vinyl scratching to your iOS or Apple Silicon device. Whether you’re a DJ, producer, or just love experimenting with sound, ScratchBud has everything you need to start scratching. Key Features: Vinyl-Like UI: Intuitive interface mimics a real DJ turntable, complete with adjustable speed fader and motor controls. Scratch Anything: Use live audio input, a loaded sample file, or the included classic “aaah” and “fresh” samples. Customizable Crossfader: Seamlessly blend between the audio input source and FX output, with MIDI note control options. Auto Scratch with LFO: Automate scratches with adjustable LFO parameters, including rate, amount, waveform, and DAW tempo sync. Advanced Recording Options: Capture, loop, and scratch up to 3 seconds of audio, with configurable recording behaviors. AUv3 Integration: Full support for AUv3 hosts, exposing all parameters for MIDI CC control and automation. Professional Sound Design: Refine your scratch sound with built-in low-pass filter controls for cutoff and resonance. Start scratching immediately with included classic samples or load your own. ScratchBud works as a standalone app or an AUv3 plugin, making it a versatile tool for your studio or live performances.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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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.
SUGGESTED BUILD STACK
React Native
Expo
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BUILD KIT DIFFICULTY
Advanced
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.
