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
FairEats
Don’t miss a single bite with this personalized route planner for the MN State Fair! The app calculates the optimal route based on all the delicious food and beverages that you choose
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
494 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 included16 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 FairEats: map the core Entertainment 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 food spot options in certain areas
Validate with people who use this workflow before building.
Hypothesis 2
Implement image caching and optimization.
Assumption to check: Slow loading times for images
Validate with people who use this workflow before building.
Hypothesis 3
Add a tutorial or onboarding flow for first-time users.
Assumption to check: Difficulties in navigation for new users
Validate with people who use this workflow before building.
Hypothesis 4
Clarify subscription benefits and simplify the purchase flow.
Assumption to check: In-app purchase confusion
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
Don’t miss a single bite with this personalized route planner for the MN State Fair! The app calculates the optimal route based on all the delicious food and beverages that you choose. Simply select your favorite food vendors or use the search bar to find what you are looking for. Click Find Foods to see the best route displayed on an easy-to-follow map. At the fair and craving cheese curds? Enable location tracking to see the number of steps to the nearest booth. Click on it and the map will guide you straight there. Want to plan your route ahead of time? Select a gate of entry. Once you arrive, enable GPS to view your progress on the map. Easy to use in one hand so that you can have a corn dog in the other. Get the most out of your day at the MN State Fair! The app is up-to-date with 2026 information. Search "2026" to see all the new foods. Helpful Tip: Looking for gluten free options? Type “gluten free” into the search bar. For full functionality, enable location tracking. The app uses GPS to calculate the optimal route from your current location, show step count to each vendor, and display your location on the map. GPS will only run when app is in use. The app does not collect any personal data. The Minnesota State Fair is not affiliated, associated or connected with the ‘FairEats’ app, nor has it endorsed or sponsored the ‘FairEats’ app. Further, the Minnesota State Fair has not licensed any of its intellectual property to the ‘FairEats’ app.
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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
Zustand
Firebase Firestore
Expo Location
React Navigation
BUILD KIT DIFFICULTY
Intermediate
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.
