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
Grams to Ounces | g to oz
Unit converter
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
3 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Grams to Ounces | g to oz: 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
Expand to include ounces to grams and other metric conversions.
Assumption to check: Limited unit conversion options.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a history feature for user convenience.
Assumption to check: No history of past conversions.
Validate with people who use this workflow before building.
Hypothesis 3
Add dark mode and other UI customization features.
Assumption to check: Lack of customization options.
Validate with people who use this workflow before building.
Hypothesis 4
Consider a more user-friendly subscription model.
Assumption to check: Paywall after few uses may frustrate 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
Unit converter Gram > Ounce (g > oz) Ounce > Gram (oz > g) You can use the unit converter to convert from one measurement to another. Type your conversion into the box. Features: - Easy to use - Convert in both directions - No ads - No InAppPurchases - No data requirements (usable without wifi / mobile data) - No elevated device privileges Alternative spelling: -------------------------------- - Gram to Ounce - Gram to Ounces - Gram to oz - Grams to Ounce - Grams to Ounces - Grams to oz - g to Ounce - g to Ounces - g to oz Further Languages: -------------------------------- غرام > أونصة Грам > Унцыя Грам > Унция Gram > Unca Gram > Unça Gram > Unce Gram > Unse Gramm > Unze Γραμμάριο > Ουγγιά Gram > Ounce Gramo > Unco Gramo > Onza Gramm > Unts Gramo > Ontza گرم > اونس Gramma > Unssi Gramme > Once Gramm > Uncia Gram > Ons Grammo > Oncia グラム > オンス 그램 > 온스 Грам > Унца Gram > Auns Gram > Uncja Grama > Onça Gram > Uncie Грамм > Унция Gram > Uns กรัม > ออนซ์ Грам > Унція گرام > اونس Gam > Ounce 克 > 安士 克 > 盎司
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
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Zustand
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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.
