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
Volume Converter L, Gal, Fl Oz
Volume Converter - Your Quick and Easy Volume Unit Converter App!
$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.
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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 included15 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 Volume Converter L, Gal, Fl Oz: 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
Expand to include more measurement types, like weight or temperature.
Assumption to check: Limited unit options for conversion
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to choose themes or color schemes.
Assumption to check: No customization options for the UI
Validate with people who use this workflow before building.
Hypothesis 3
Implement a conversion history feature for tracking past conversions.
Assumption to check: Absence of a history feature
Validate with people who use this workflow before building.
Hypothesis 4
Add a feature for users to submit feedback on conversions.
Assumption to check: No user feedback on conversion accuracy
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
Volume Converter - Your Quick and Easy Volume Unit Converter App! Looking for a lightning-fast and incredibly simple way to convert volume units? Look no further! Our Universal Volume Converter app is here to make unit conversions a breeze. Whether you want to convert liters to gallons, cubic meters to cubic feet, or any other volume unit conversion, this app has got you covered. Here are some fantastic features of our one-stop volume converter: Instant Unit Conversion: Say goodbye to tedious calculations! Our app instantly converts your input to the desired unit, whether it's liters (L) to gallons (gal), cubic meters (m³) to cubic feet (ft³), or any other volume conversion. Sleek and User-Friendly Interface: We believe in keeping things simple and visually appealing. Our app boasts a clean and intuitive design for an effortless user experience. Compact Installation Size: Don't worry about taking up precious storage space on your device. Our app comes in a small installation size, ensuring it won't weigh you down. No Internet Required: Stay connected or go offline – our app works seamlessly without an internet connection, making it a reliable tool whenever and wherever you need it. Effortless Conversion Process: Using our app is as easy as 1-2-3. Simply select the input unit, enter your number, choose the desired output unit, and watch it convert instantly. Customizable Conversion: Need to convert between any two volume units? Our app offers a wide range of options for converting volumes to suit your needs. Don't waste time on manual conversions or complicated calculations. Download our Volume Converter app today and enjoy the simplicity of effortless volume unit conversions. Say hello to convenience and bid farewell to volume conversion headaches!
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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
axios
react-native-paper
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.
