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
Buddy Blood Pressure(Track BP)
Disclaimer:
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
9 ratings · Top 30%
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 included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Buddy Blood Pressure(Track BP): map the core Lifestyle 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
Expand to include more detailed graphs and comparisons.
Assumption to check: Limited data visualization options for trends
Validate with people who use this workflow before building.
Hypothesis 2
Add a customizable reminder feature for users.
Assumption to check: No reminders for regular measurements
Validate with people who use this workflow before building.
Hypothesis 3
Implement options to export data in various formats for sharing.
Assumption to check: Lack of export options for health data
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate social sharing or community features to increase user retention.
Assumption to check: Minimal user engagement features
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
Disclaimer: The 'Buddy Blood Pressure' App does not connect to any external hardware, apart from using this app and before making any medical decisions you should seek the advice of a doctor, if solely based on the 'Buddy Blood Pressure' App for your health According to analysis, any health problems that arise have nothing to do with Apple or our company. Thank you! You can easily record, analyze and manage your blood pressure with just one application, Buddy Blood Pressure! Main feature: 1>Data record: You can enter the systolic blood pressure, diastolic blood pressure and pluse data, and then select the measurement time to record, and finally view the data in the form of a chart or a list. 2>Blood pressure trend analysis: According to the blood pressure and time data you input, we will automatically generate charts, the measurement data at different times are displayed in the same chart, and the recent blood pressure rise and fall changes can be seen at a glance! 3>Information section: We have set up a special information section about blood pressure. By reading the information, you will learn some common knowledge about blood pressure and help you have a deeper understanding of your own condition.
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
Supabase
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React Navigation
Zustand
BUILD KIT DIFFICULTY
Starter
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.
