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.
Heartica: Heart Rate Tracker
Free · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Heartica: Heart Rate Monitor: 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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Affiliate link: CloneChart may earn a commission at no extra cost
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Heartica: Heart Rate Tracker Measure Heart Rate, Stress & Vitals. Track Blood Pressure, Glucose & Heart Age. Best for: - Anyone monitoring heart health - People managing stress and energy - Those tracking blood pressure or glucose - Users who want heart rate tracking without a wearable Use this app to: - Measure heart rate instantly using your iPhone camera - Track blood pressure, oxygen, and glucose in one place - Understand stress patterns with Chronic Stress Index - Discover your heart age and compare to biological age - Log data with tags like ""sleep"" or ""activity"" - Generate reports to share with your doctor Overview Looking for a simple way to track heart health? Heartica turns your iPhone into a personal health companion. Measure heart rate using just the camera, log blood pressure and glucose, and get insights into stress levels and heart age. No extra hardware needed. How It Works - Place your fingertip on the camera lens. - Hold still for a few seconds while Heartica measures your heart rate. - View results instantly and track trends over time. - Add manual entries for blood pressure, oxygen, or glucose. - Use tags like ""stress"" or ""exercise"" to categorize data. Key Features - Instant Heart Rate Measurement Measure heart rate anytime using your phone's camera. No wearable required. - Chronic Stress Index Get insights into long-term stress patterns and how your body responds to daily life. - Heart Age Discover the difference between your chronological age and your heart's estimated age. - Comprehensive Health Stats Track blood pressure, oxygen levels, glucose, pulse, and energy in one place. - Tag-Based Filtering Add context with tags like ""sleep,"" ""stress,"" or ""workout."" Filter data to spot patterns. - Progress Tracking & Reports View trends over time and generate PDF reports to share with your doctor. - Smart Reminders Set custom reminders so you never miss a measurement. Supported Health Metrics - Heart rate (camera measurement) - Blood pressure (manual log) - Blood oxygen (manual log) - Blood glucose (manual log) - Stress index (calculated) - Heart age (calculated) Use Cases - Check heart rate after a workout to see recovery. - Track blood pressure daily and spot stress-related patterns. - Share a health report with your doctor before checkups. - Monitor stress over time and identify triggers. - Discover your heart age and take steps to improve it. FAQ Can I measure heart rate without a smartwatch? Yes. Heartica uses your iPhone's camera. Place your fingertip on the lens for a few seconds. Is this a replacement for medical advice? No. Heartica is for informational purposes only. Consult a doctor for medical advice. Can I track blood pressure and glucose? Yes. You can manually log readings and track trends over time. What is the Chronic Stress Index? It analyzes heart rate patterns to give insights into long-term stress levels. Can I share data with my doctor? Yes. Export detailed reports and graphs to share with healthcare providers. Disclaimer Heartica is for informational purposes only and does not provide medical advice. Consult your doctor before making health-related decisions. Upgrade to Premium Unlock unlimited measurements, advanced analytics, enhanced stress index, and more. Subscription Information - Subscriptions: 1 week or 12 months, auto-renewing - 3-day free trial, then automatic charge unless cancelled - Payment charged to App Store account upon confirmation - Manage subscriptions in account settings Privacy Policy: https://heartica.pro/pp Terms of Use: https://heartica.pro/tou Support: [email protected]
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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
Assumption to check: Users report inaccuracies in heart rate readings.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited historical data insights.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social sharing features.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Paywall after limited usage.
Validate with people who use this workflow before building.
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.