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
SoundBed: Focus Sound Mixer
SoundBed generates calm, endless ambient sound to help you focus, relax, or sleep — rain, ocean swell, brown noise, cafe murmur, and a deep drone — all synthesized live on your device.
$1.99 · In-app purchases
PRICE
$1.99
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
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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Add to a Remix
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 SoundBed: Focus Sound Mixer: map the core Productivity 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
Implement advanced search and filtering options.
Assumption to check: Difficulty in finding the right sound mix for specific needs.
Validate with people who use this workflow before building.
Hypothesis 2
Regularly update with new sounds and categories.
Assumption to check: Limited sound library.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce personalized sound recommendations.
Assumption to check: Poor user retention due to lack of unique features.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to download mixes for offline use.
Assumption to check: No offline mode available.
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
SoundBed generates calm, endless ambient sound to help you focus, relax, or sleep — rain, ocean swell, brown noise, cafe murmur, and a deep drone — all synthesized live on your device. REAL SOUND SYNTHESIS, NO LOOPS SoundBed doesn't play looped recordings. Every bed is generated procedurally in real time, so the rain never repeats and the ocean never skips. It also means the app is tiny and works completely offline. MIX YOUR OWN ATMOSPHERE Layer up to three sounds with independent volume — rain over brown noise, cafe over ocean — and save your favorite mixes as presets for one-tap recall. DRIFT OFF ON A TIMER Set 15, 30, 60 minutes or a custom timer and SoundBed fades out gently. On iPhone and iPad it keeps playing in the background while you use other apps or lock the screen. CALM BY DESIGN A slow, breathing color field follows your mix. No account, no ads, no tracking, no network access — just sound. One purchase covers Mac, iPhone, and iPad. No subscription.
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/native
react-native-slider
expo-av
Zustand
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.
