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
Health Metrics Widgets
Health Metrics Widgets brings your Apple Health data to your Home Screen in a clean, focused, and easy-to-read way.
$1.99 · In-app purchases
PRICE
$1.99
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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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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/
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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 Health Metrics Widgets: 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
Provide extensive options for users to personalize widget designs and metrics.
Assumption to check: Limited customization options for health widgets
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate integrations with platforms like Google Fit and Fitbit.
Assumption to check: Lack of integration with popular health platforms
Validate with people who use this workflow before building.
Hypothesis 3
Enable users to share their progress and challenges with friends.
Assumption to check: Absence of social sharing features
Validate with people who use this workflow before building.
Hypothesis 4
Add challenges and rewards for completing health goals.
Assumption to check: No gamification elements to motivate 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
Health Metrics Widgets brings your Apple Health data to your Home Screen in a clean, focused, and easy-to-read way. Choose from many widget options, including simple value widgets and widgets with compact charts. Keep your key health metrics visible at a glance — without clutter, unnecessary dashboards, or complicated setup. Supported metrics include heart rate, steps, distance, weight, waist circumference, dietary energy, HRV, BMI, blood pressure, blood glucose, body temperature, wrist temperature, and exercise time. Open any metric in the app to view a clear history, charts, and useful summary stats. You can quickly switch between day, 24-hour, week, month, and year views to better understand how your values change over time. Health Metrics Widgets is designed to be simple, private, and flexible. Features: • Many Home Screen widget options • Widgets with compact trend charts • Light, dark, and automatic widget appearance • Clean metric history directly in the app • Charts and summary statistics for individual metrics • Distance shown with steps, using miles or kilometers • Customizable metric order • Choose which metrics are shown • Support for 12 languages • No account required • No tracking • No ads • No subscription Your data stays on your device. The app reads values from Apple Health using HealthKit and does not upload your health data to any server. Important: Health Metrics Widgets is not a medical app and does not provide medical advice, diagnosis, treatment, or health recommendations. It only displays values available in Apple Health.
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
Zustand
React Navigation
expo-health
react-native-reanimated
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.
