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
Soothing Sonic: Calming Sounds
Escape the chaos and find serenity with HQ Soothing Audio.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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.
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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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 Soothing Sonic: Calming Sounds: map the core Lifestyle 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 the sound library with user-generated content and partnerships.
Assumption to check: Limited sound library compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a recommendation engine based on user preferences.
Assumption to check: Difficulty in discovering new sounds.
Validate with people who use this workflow before building.
Hypothesis 3
Add customizable playlists and sound mixing options.
Assumption to check: Lack of personalization features.
Validate with people who use this workflow before building.
Hypothesis 4
Ensure a quality check process for all audio files.
Assumption to check: Inconsistent audio quality across tracks.
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
Escape the chaos and find serenity with HQ Soothing Audio. Dive into White noise, Green Noise, Brown noise, Ocean noise, and many other captivating soundscapes designed to help you relax, sleep better, boost focus and meditate. Let the power of sound elevate your well-being and create your personal oasis of calm. Key Features: * Dive into Tranquility: Explore a vast library of high quality noise frequencies and captivating soundscapes. Impeccable audio quality ensures a seamless and uninterrupted sonic experience. * Enhance Sleep & Relaxation: Drift into a deep slumber and unwind with soundscapes tailored to sleep aid. * Boost Focus & Productivity: Create an optimal environment for work, study, or meditation. * Soothe Your Little Ones: Calm and comfort your baby with gentle sounds that promote restful sleep and relaxation. * Find Peace & Serenity: Alleviate stress and anxiety, improve mental well-being, and create a tranquil ambiance. * A single purchases guarantees the full app experience and free updates: No In App Purchases, No ads, No logins and No subscriptions. Unlock the transformative power of sound with Soothe Sonic. Download now and immerse yourself in a world of relaxation, focus, and tranquility.
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
react-navigation
expo-av
@react-native-async-storage/async-storage
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.
