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
Simple White Noise
Discover tranquility with Simple White Noise, where simplicity meets serenity
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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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 included15 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 Simple White Noise: map the core Health & Fitness 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 a wider variety of sounds or user-uploaded content
Assumption to check: Limited sound selection compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a customizable sleep timer
Assumption to check: No sleep timer functionality
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to play sounds in the background while using other apps
Assumption to check: No background playback support
Validate with people who use this workflow before building.
Hypothesis 4
Enable users to create playlists or favorite sounds for easy access
Assumption to check: Lack of user customization options
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
Discover tranquility with Simple White Noise, where simplicity meets serenity. Whether you're looking to enhance your focus, drift into peaceful sleep, or create a calming atmosphere, our thoughtfully crafted collection of premium noise sounds is here to help. What sets Simple White Noise apart: - A choice of pure, high-quality sounds - Experience perfectly calibrated white, pink, blue, violet and brown noise, each masterfully engineered for optimal relaxation and concentration. - Elegantly Simple Design with dark and light mode support - No complicated menus or endless options – just launch the app and find your perfect sound in seconds. We believe peace of mind shouldn't require a learning curve. - Drift off to sleep worry-free with our intelligent timer, or create your perfect ambient environment by fine-tuning volume levels. - Stream to AirPlay or Bluetooth receivers - No Subscriptions Ever Unlike other apps, Simple White Noise is yours forever with a single purchase. No monthly fees, no hidden costs – just pure, unlimited access to all features, including future upgrades and enhancements. Perfect for: Deep, restful sleep Focused work sessions Meditation and relaxation Blocking out distracting environments Creating a peaceful study atmosphere Download Simple White Noise today and discover why sometimes the simplest solution is the best one. Your journey to better focus and sleep starts here.
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.
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BUILD KIT DIFFICULTY
Intermediate
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.
