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
CleanSound: Speaker Cleaner
Clear your speakers from water in seconds!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
10,332 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.
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's included17 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 CleanSound: Speaker Cleaner: map the core Utilities 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 a wider range of frequencies and user customization.
Assumption to check: Limited frequency options may not work for all devices
Validate with people who use this workflow before building.
Hypothesis 2
Integrate user feedback to improve frequency effectiveness.
Assumption to check: Some users find the cleaning effectiveness inconsistent
Validate with people who use this workflow before building.
Hypothesis 3
Offer a better ad-free experience through a premium subscription.
Assumption to check: Ads can be intrusive
Validate with people who use this workflow before building.
Hypothesis 4
Enhance onboarding with detailed guides and tips.
Assumption to check: Lack of detailed instructions on usage
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
Clear your speakers from water in seconds! Accidentally got your phone wet? Don’t worry — our app helps you eject water from your device’s speakers using sound frequencies specially designed to remove moisture and restore clear sound. Key Features: • Fast water removal – Clear water from speakers in just a few seconds. • Adjustable frequency – Fine-tune the sound wave frequency for optimal results. • Progress tracking – See the ejection progress in real-time. • Simple & clean interface – Intuitive design for quick use in any situation. • Safe for your device – Uses only sound, no hardware interference. How it works: The app emits a specific sound frequency that vibrates the speaker membrane, forcing water droplets out. Just press Start and let the app do the rest! When to use: • After accidental splashes • After exposure to rain • After cleaning your device • Anytime your speakers sound muffled Our Privacy Policy: https://www.termsfeed.com/live/ac2e5c60-4f73-431f-af4a-ed60b0cf7cd7 Our Terms of Use: https://www.termsfeed.com/live/a14647cb-7eed-44ad-bf5c-1055102039c5 Our Support: https://twitter.com/HelOksy
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
Starter
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.
