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.
Heart Beat lets you measure your heart rate using your smartphone camera and keep your wellness records in one place
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 Heart Beat: 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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Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Heart Beat lets you measure your heart rate using your smartphone camera and keep your wellness records in one place. Check your pulse in beats per minute (BPM), save results, and review your measurement history. You can also manually log blood pressure, blood oxygen, stress levels, and heart rate variability (HRV) values. KEEP TRACK OF YOUR WELLNESS Whether you're checking your pulse after exercise or reviewing your previous records, Heart Beat makes it easy to keep your wellness information organized and accessible. WHAT YOU CAN DO WITH HEARTBEAT Heart Rate Measurement Measure your pulse using your smartphone camera and view your heart rate in BPM. Pulse History Save and review previous heart rate measurements. Blood Pressure Log Manually enter systolic and diastolic blood pressure readings taken with a separate monitor. Blood Oxygen Log Manually enter blood oxygen (SpO2) readings from a separate measurement device. Stress Level Log Record your stress levels manually and review previous entries. HRV Log Manually enter heart rate variability (HRV) values obtained from other sources. Heart Health Education Read general educational information about heart health and cardiovascular symptoms. Measurement History Review saved pulse measurements and manually entered wellness records. Multi-Profile Support Organize wellness records for up to three users. YOUR WELLNESS RECORDS IN ONE PLACE Keep a history of your pulse results alongside manually entered blood pressure, blood oxygen, stress, and HRV values. Heart Beat helps you maintain and review a personal record of your wellness information as part of your daily routine. KEY FEATURES Finger-based heart rate measurement using your smartphone camera View your pulse readings for everyday heart rate tracking Multi-profile support for up to 3 users Daily summaries and heart rate measurement history Manual stress level logging and wellness records Blood pressure, blood oxygen (SpO2), and HRV logging for easy record keeping IMPORTANT HEALTH INFORMATION Heart Beat is intended for general wellness and informational purposes only. It is not intended for medical diagnosis, treatment, or emergency use. The app uses your smartphone camera to measure pulse. It does not measure blood pressure, blood oxygen, stress, or HRV; users enter these values manually. Heart Beat does not detect or diagnose heart attacks, arrhythmias, or other cardiovascular conditions. Do not use the app to make medical decisions. Consult a qualified healthcare professional for medical concerns. Seek immediate medical attention if you experience symptoms of a medical emergency. Contact: [email protected] Privacy Policy: https://heartbeatapp.co/privacy Terms: https://heartbeatapp.co/terms SUBSCRIPTION INFORMATION Subscriptions are offered as auto-renewable plans on a weekly, monthly, or yearly basis (pricing may vary by country). Payment will be charged to your Apple ID account at confirmation of purchase. Your subscription will automatically renew unless it is canceled at least 24 hours before the end of the current billing period, and your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription at any time through your Apple Account Settings after purchase. If a free trial is offered, any unused portion of the trial period will be forfeited upon purchasing a subscription.
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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: Limited customization for insights and recommendations
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Inconsistent measurement accuracy
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Lack of social features for sharing progress
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Limited integration with other health apps
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.