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
Ravenscroft 275 Piano
Experience the splendor of a Ravenscroft Grand with the most realistic sounding piano ever created for iOS
$35.99 · In-app purchases
PRICE
$35.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.4
317 ratings · Top 30%
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's included15 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.
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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Ravenscroft 275 Piano: 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
Include advanced sound settings for greater user control.
Assumption to check: Limited sound customization options
Validate with people who use this workflow before building.
Hypothesis 2
Introduce a freemium model with basic features for free.
Assumption to check: High price point
Validate with people who use this workflow before building.
Hypothesis 3
Add features to share recordings on social media.
Assumption to check: Lack of social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Implement MIDI connectivity for professional users.
Assumption to check: No MIDI support for external devices
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
Experience the splendor of a Ravenscroft Grand with the most realistic sounding piano ever created for iOS. Launch the app and access the gorgeous tone of this one-of-a-kind concert grand from your iPhone or iPad. The origins of this virtual instrument lie in the masterfully crafted Ravenscroft 275 Titanium Grand Piano - made of 1,000 year old sitka spruce wood with solid titanium string termination points and precise, responsive CAD optimized action. The same quest for the highest fidelity sounds has spurred the deep sampling and meticulous capturing of this piano for the app. The final result delivers crystal clear hammer attacks, staccato release trails, and much more. Every detail has been painstakingly crafted to bring you the most authentic piano experience ever on iOS. SOUND - High-resolution audio recording via premium microphones and pristine converters - 100% sample-based sounds with hybrid modeling - Real sympathetic resonance - Accurate sustain pedal modeling including re-pedaling support - Over 1,000 release samples for true staccato FEATURES - UVI Sparkverb reverb integrated - 3 Band EQ and timbre shift - Customizable MIDI and Dynamics response - Fully resizable and customizable 1 or 2-tier keyboard - Save/Load presets - Lossless FLAC format provides the highest quality with smallest disk footprint and fast loading times - Very efficient use of RAM and CPU resources CONNECTIVITY - Inter-App Audio / Audiobus support - Audio Unit v3 Plugin - External keyboard and MIDI-over-LAN support via CoreMIDI - Bluetooth MIDI Keyboard Compatible SYSTEM REQUIREMENTS - Supported Operating System: iOS 9.3+ - Works on: iPad 4 or newer iPhone 5 or newer (iPhone 6 or newer recommended) iPod Touch 6 or newer - 883MB of disk space www.uvi.net/ravenscroft-275-piano.html
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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.
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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.
