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
iCardiac: Heart Rate & Health
Your Heart Rate and Wellness Journal
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
30,938 ratings · Top 15%
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 included17 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 iCardiac: Heart Rate & Health: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Your Heart Rate and Wellness Journal Keep your daily wellness records in one place with iCardiac. Measure your heart rate, log readings from external devices, and review your recorded trends over time. Blood pressure tracking is a journaling feature only. iCardiac does not measure or estimate blood pressure. TRACK YOUR HEART MEASUREMENTS • Heart Rate & HRV: Use your phone's camera to measure heart rate (HR), expressed in beats per minute (BPM), and heart rate variability (HRV). Save your readings and review your history. • Apple Watch Integration: Sync supported heart measurements from your Apple Watch to keep your records up to date. • Wellness Check-Ins: Record your heart measurements regularly and review changes over time. BUILD YOUR PERSONAL WELLNESS JOURNAL • Blood Pressure Log: Manually enter blood pressure readings taken with a separate blood pressure monitor. Review your saved entries and trends over time. • Additional Wellness Records: Log body temperature and oxygen saturation (SpO2) readings obtained from external devices. These features record existing readings; they do not measure body temperature or SpO2. • Mood & Activity Log: Record your daily mood and activities alongside your wellness entries. YOUR AI WELLNESS ASSISTANT • Personalized Tracking Experience: Explore wellness-focused content and tools to support your daily tracking routine. INTEGRATION & REPORTS • Apple Health Sync: Sync supported wellness data with Apple Health, with your permission. • Shareable Reports: Create reports of your logged readings and wellness records for personal reference or discussion with a healthcare professional. DISCLAIMER: – iCardiac is intended only for general wellness and fitness purposes. – iCardiac should not be used as a medical device or for the diagnosis, treatment, monitoring, or prevention of any disease or medical condition. – iCardiac does not measure or estimate blood pressure and is not a substitute for a blood pressure monitor. – Information and AI-generated content are for informational purposes only and should not be considered medical advice. – Always consult a qualified healthcare professional regarding any medical concerns or health-related decisions. – iCardiac is not intended for medical emergencies. If you believe you are experiencing a medical emergency, contact emergency services immediately. – The device flash may become warm during camera-based heart measurements. Privacy Policy: https://begamob.com/cast-policy.html Terms of Use: https://begamob.com/ofs-termofuse.html
Written user reviews are not shown here. Check current App Store reviews >
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
Include HealthKit/Google Fit integration for broader connectivity.
Assumption to check: Limited integration with other health apps
Validate with people who use this workflow before building.
Hypothesis 2
Adopt a cleaner design with focused features.
Assumption to check: User interface can feel cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Provide CSV/Excel export functionality for user data.
Assumption to check: Data export options are limited
Validate with people who use this workflow before building.
Hypothesis 4
Introduce social features for sharing progress and challenges.
Assumption to check: No social sharing features
Validate with people who use this workflow before building.
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.
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BUILD KIT DIFFICULTY
Advanced
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.
