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
Silence Music
"I love this app so muchhh!!!!" - by jasminn!!!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
12,323 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's included18 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 Silence Music: 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
Ensure robust offline listening features with seamless downloads.
Assumption to check: Limited offline functionality in music apps
Validate with people who use this workflow before building.
Hypothesis 2
Create a clean, organized layout with intuitive navigation.
Assumption to check: Difficult navigation and cluttered UI
Validate with people who use this workflow before building.
Hypothesis 3
Implement advanced search filters and AI suggestions.
Assumption to check: Inadequate search features
Validate with people who use this workflow before building.
Hypothesis 4
Offer competitive pricing with more value in subscription tiers.
Assumption to check: High subscription costs
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
"I love this app so muchhh!!!!" - by jasminn!!! "Excellent app with excellent customer service! Thank you." - by Beam Jirayu "This app is amazing. I love being able to listen to YouTube videos with my screen off. This was worth the purchase, itself." - by Deezie313 Silence Music is the best way to listen to music on your device directly from YouTube and SoundCloud. Here's a brief overview of Silence Music's features: - Bass Booster & Amazing Equalizer - Stream SoundCloud top tracks - Stream unlimited YouTube music - Sync up favorite playlists from Youtube account - Search for any track, playlist or artist and listen absolutely for free. - Create, edit and share playlists. Build your biggest, best music collection. - Sleep Timer. - 100% ad-free. - Create party rooms, enjoy being a DJ - Join party rooms, broadcasted by most popular Silence Music hosts worldwide More than 1 million users enjoy using this app each day. Download it now! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
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
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expo-av
zustand
BUILD KIT DIFFICULTY
Expert
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.
