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
Easy CPR
Easy CPR — Audiovisual cues for life-saving compressions
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Easy CPR: 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
Incorporate quizzes and interactive lessons to enhance user learning.
Assumption to check: Limited user engagement due to lack of interactive content.
Validate with people who use this workflow before building.
Hypothesis 2
Add practice sessions or simulations for users to practice CPR.
Assumption to check: Users may forget steps without practice.
Validate with people who use this workflow before building.
Hypothesis 3
Offer user-specific recommendations based on quiz performance.
Assumption to check: Lack of personalized content.
Validate with people who use this workflow before building.
Hypothesis 4
Provide a free trial period to encourage subscriptions.
Assumption to check: Paywall may deter 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
Easy CPR — Audiovisual cues for life-saving compressions Easy CPR helps you deliver consistent chest compressions during cardiopulmonary resuscitation. Whether you're a trained first-aider refreshing your timing or a bystander stepping up in an emergency, the app gives you a steady rhythm to follow with clear beeps, spoken counts, and a pulsing on-screen heart. Features - Adjustable BPM picker to match recommended compression rates - Audio beeps and voice counts (1–4) to keep your tempo steady - Animated beating heart for visual pacing - "CPR with rescue breaths" mode — 30 compressions, then a prompt for 2 breaths - Built-in instructions and guidance, aligned with NHS England recommendations - Companion Apple Watch app for hands-free pacing - Built natively in SwiftUI for a clean, responsive experience Disclaimer: This app follows standards recommended by NHS England. If these standards do not align with your medical practice, do not use this app. Familiarise yourself with the use of the app with the Instructions provided. The creator of the app is not responsible for mishaps due to misuse/malfunction of the app.
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
@react-navigation/native
react-query
expo-av
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.
