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
Sound Oasis White Noise Pro
Sound Oasis® is the world leader in sound therapy systems
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
5 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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Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 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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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 Sound Oasis White Noise Pro: 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
Expand sound library with user submissions and premium sounds.
Assumption to check: Limited sound selection compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Add options for users to share favorite sounds with friends.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
Hypothesis 3
Integrate sleep tracking to enhance user experience.
Assumption to check: No sleep tracking or analytics
Validate with people who use this workflow before building.
Hypothesis 4
Consider a subscription model for access to all sounds.
Assumption to check: In-app purchase model may deter users
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
Sound Oasis® is the world leader in sound therapy systems. These professionally recorded and edited soundscapes have been carefully developed to help you relax and sleep. This app includes 13 sounds, a unique 12-band equalizer for customizing each sound to your personal preference, a fully functional playback timer and soft-off volume management. How Does This APP Work? This app can be an effective tool to help you relax and fall asleep using sounds as a therapeutic masking tool. White noise creates a familiar, highly effective way to relax, block out unwanted noises and create a soothing and consistent sound environment. These White Noise tracks are carefully designed so that you experience our world famous sounds uninterrupted for the best sleep experience possible. Features: 13 INCLUDED THERAPEUTIC WHITE NOISE TRACKS: - Air Conditioner - Alelele Waterfall - Brown Noise - Cooling Fan - Full Spectrum White Noise - Gray Noise - Jet Interior White Noise - Natural White Noise - Pink Noise - Radio Static - Rain on a Tent - Steady Rain - White Noise SESSION TIMER - 5 to 120 minute session timer with continuous therapy option. 12 BAND GRAPHIC EQUALIZER WITH INDIVIDUAL SOUND MEMORY - Control precise frequency levels of sound playback with exclusive 12 band graphic equalizer. - Tune each sound to your personal frequency preference. - Automatically save up to 2 of your favorite equalizer settings for each sound. SOFT-OFF VOLUME MANAGEMENT - Full volume control with soft-off volume management.
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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.
SUGGESTED BUILD STACK
React Native
Expo
React Navigation
Zustand
expo-av
react-native-reanimated
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.
