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
EWG's Healthy Living
Wondering what's really in your food, skincare and cleaning products? EWG's Healthy Living gives you instant, science-backed safety ratings
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.7
2,332 ratings · Top 50%
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/
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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 EWG's Healthy Living: map the core Health & Fitness 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
Enhance database with user-generated content and reviews.
Assumption to check: Limited product database leads to incomplete information.
Validate with people who use this workflow before building.
Hypothesis 2
Create a modern, engaging UI with better color schemes and layouts.
Assumption to check: User interface is not visually appealing.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize data fetching and caching for quicker access.
Assumption to check: Slow loading times for product searches.
Validate with people who use this workflow before building.
Hypothesis 4
Add filters for dietary restrictions (vegan, gluten-free, etc.) to improve user experience.
Assumption to check: Inadequate support for dietary preferences.
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
Wondering what's really in your food, skincare and cleaning products? EWG's Healthy Living gives you instant, science-backed safety ratings. Scan any product for free. Built on 30+ years of independent research from EWG scientists, our app is the only one that covers more than 200,000 rated products across cosmetics, food and household cleaners. Why get the Healthy Living App? - Scan & Search Instantly: Barcode-scan any product or search by name to get a simple 1–10 safety score (1 = best). - Science-Backed Ratings: Built on EWG's independent research — not algorithms alone. - All-in-One: Combines our most trusted resources in one app: Skin Deep® for cosmetics, our Guides to Sunscreens and Healthy Cleaning, and our Food Scores database. - Find Safer Alternatives: Compare products and discover better-rated options for your family and pets. - Built on Trust: Independent and nonprofit. EWG's Skin Deep, Food Scores and Guide to Sunscreens have set the standard for ingredient transparency for over three decades. Now it's all in your pocket. Download now and start making safer choices for your family. For the most accurate data, please update to the latest version. Terms of Use: https://www.ewg.org/eula
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
Supabase
Zustand
@react-navigation/native
expo-camera
BUILD KIT DIFFICULTY
Advanced
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.
