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
ER Wait Time - Emergency Wait
Emergency Room Wait Time Tracker - Find the Fastest Care Near You
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.0
2 ratings · Below Average
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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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 ER Wait Time - Emergency Wait: map the core Medical 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 database to include more hospitals.
Assumption to check: Limited hospital coverage in rural areas
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more reliable API for accurate wait times.
Assumption to check: Data may not always be real-time
Validate with people who use this workflow before building.
Hypothesis 3
Consider offering more valuable free features or a better trial.
Assumption to check: Subscription model may deter users
Validate with people who use this workflow before building.
Hypothesis 4
Simplify UI design for better usability.
Assumption to check: User interface may feel cluttered
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
Emergency Room Wait Time Tracker - Find the Fastest Care Near You Stop guessing ER wait times. ER Wait Time provides real-time emergency room wait times and helps you find the quickest care when every minute matters. KEY FEATURES: Real-time ER wait times from local hospitals, GPS-powered hospital finder with distance and travel time, user reviews and ratings for each emergency room, detailed hospital information including contact details, offline mode with cached data for reliable access, and emergency contact integration. HOW IT WORKS: Enable location services to find nearby hospitals, view real-time wait times for each emergency room, compare travel time vs wait time to choose the best option, get directions and contact information instantly, and share your experience to help other users. PERFECT FOR: Emergency situations requiring immediate care, planning ahead for non-critical medical needs, finding the most efficient emergency care, avoiding overcrowded emergency rooms, and getting hospital contact information quickly. SAVE TIME, SAVE LIVES: When medical emergencies happen, every minute counts. ER Wait Time helps you make informed decisions about where to seek emergency care, potentially saving valuable time when it matters most. Download ER Wait Time today and never wait unnecessarily at the emergency room again. IMPORTANT LEGAL DISCLAIMERS: This app provides estimated wait times and should not be used as the sole basis for medical decisions. In life-threatening emergencies, call 911 immediately and do not rely on app data. Wait times are estimates and may vary based on actual conditions. Always verify hospital information and availability before traveling. This app does not provide medical advice, diagnosis, or treatment recommendations. Users are responsible for their own medical decisions and emergency care choices. App data is for informational purposes only and may not reflect real-time conditions. MEDICAL EMERGENCY PROTOCOL: For life-threatening emergencies, call 911 immediately. For serious injuries, go to the nearest emergency room regardless of wait times. For non-emergency care, use this app to find the most efficient option. Always consult with healthcare professionals for medical advice. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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
Axios
@react-navigation/native
@supabase/supabase-js
Zustand
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.
