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
Hungryroot: Healthy Groceries
Discover the easiest way to eat healthy.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
25,256 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
Make this idea yours
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 included18 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 Hungryroot: Healthy Groceries: map the core Food & Drink 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 personalized grocery suggestions based on user preferences.
Assumption to check: Limited dietary customization options
Validate with people who use this workflow before building.
Hypothesis 2
Offer competitive pricing or free shipping on subscriptions.
Assumption to check: High delivery fees compared to competitors
Validate with people who use this workflow before building.
Hypothesis 3
Integrate real-time chat support for quicker assistance.
Assumption to check: Slow customer support response times
Validate with people who use this workflow before building.
Hypothesis 4
Collaborate with local stores to expand product offerings and delivery options.
Assumption to check: Lack of local grocery store partnerships
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
Discover the easiest way to eat healthy. Hungryroot delivers nutritious groceries, easy recipes, and essential supplements straight to your door. You tell us about your tastes, dietary needs, and health goals, then SmartCart™ recommends groceries, recipes, and supplements tailored to you. Spend less time planning, shopping, and cooking, and more time doing what you love. GET PERSONALIZED RECOMMENDATIONS SmartCart™ — a first-of-its-kind grocery technology — fills your cart with food you’ll love. CUSTOMIZE YOUR DELIVERY Take our suggestions or edit your cart to get exactly what you want each week. SIMPLIFY YOUR SHOPPING WITH SMARTCART™ Save time and stress as SmartCart™ provides personalized recommendations each week. SIT BACK + ENJOY Get delicious, healthy groceries and recipes delivered to your door. Skip a week or cancel anytime. “Before Hungryroot, my diet was pretty boring: I’d rotate through the same few recipes each week, and filling up my cart at the grocery store was quite a chore. I now rely on Hungryroot more and more each week—they add much-needed variety to my diet.” —Jeremy M. “My cholesterol is 1/3 of what it was, I have lost 20 lbs, and I feel amazing every day.” —Jessica K. Learn more at Hungryroot.com
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
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.
