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
Holter Log
Holter Log is a patient-entered diary designed to make it easier to keep clear, organized notes during a Holter monitor study.
$0.99
PRICE
$0.99
No 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's included
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 Holter Log: 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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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
Holter Log is a patient-entered diary designed to make it easier to keep clear, organized notes during a Holter monitor study. Instead of relying on memory or writing events down on paper, you can quickly record symptoms, activities, sleep, naps and other notes as they happen. Keep a clear record Record the events that may be useful when reviewing your Holter study, including: • Symptoms and the time they occurred • Activities and everyday events • Sleep and naps • Notes and additional details • Events recorded from your iPhone or Apple Watch companion Your entries stay organized in a simple timeline so you can review what happened during the monitoring period. Create a useful report When your study is complete, Holter Log can create a clear PDF diary from the information you entered. Review the report before sharing it with your doctor, clinic or care team. Available in 49 languages Holter Log includes 49 in-app languages, with automatic language selection and a manual language option when you want to choose a different language. Designed for the patient Holter Log is designed to help you record your own observations during a Holter monitoring period. Holter Log does not connect to, read, analyze or interpret data from your Holter monitor or ECG. It does not diagnose medical conditions and is not a substitute for professional medical advice, diagnosis or treatment. If you are experiencing symptoms that may require urgent medical attention, contact your local emergency services or an appropriate healthcare professional.
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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 customizable notifications for logging data.
Assumption to check: Lack of user engagement features such as reminders or notifications
Validate with people who use this workflow before building.
Hypothesis 2
Implement interactive graphs with filtering options.
Assumption to check: Difficulties in visualizing trends effectively
Validate with people who use this workflow before building.
Hypothesis 3
Add functionality to share logs directly with doctors via email or PDF.
Assumption to check: Limited data sharing options with healthcare professionals
Validate with people who use this workflow before building.
Hypothesis 4
Provide onboarding tutorials to help users understand app features.
Assumption to check: No in-app guidance or tutorials
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.
SUGGESTED BUILD STACK
React Native
Expo
React Navigation
Axios
react-native-chart-kit
zustand
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
