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
RENPHO Health
Good health comes first!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
8,958 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 RENPHO 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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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
Implement a more robust and user-friendly sync feature.
Assumption to check: Users report difficulty syncing with smart devices
Validate with people who use this workflow before building.
Hypothesis 2
Offer a comprehensive food database with barcode scanning.
Assumption to check: Inadequate meal logging options
Validate with people who use this workflow before building.
Hypothesis 3
Introduce social challenges and leaderboards to boost engagement.
Assumption to check: Limited community features
Validate with people who use this workflow before building.
Hypothesis 4
Simplify pricing tiers and provide clearer value propositions.
Assumption to check: Confusing subscription model
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
Good health comes first! RENPHO Health is the best helper in your journey to becoming fitter. The app can track multiple body composition metrics (BMI, Body Fat %, Body Water, Bone Mass, Basal Metabolism Body Age, Muscle Mass, etc). The cloud-based App’s intelligent data analysis and tracking abilities makes it your perfect digital personal helper. It can even convert your data stored over time into charts and reports that can easily be shared by e-mail and multiple social media channels. On top of all that, your entire family can use the App! RENPHO Health allows the user to create multiple personal profiles to keep your data separated. When you use our smart body scales measuring body composition , weight, percentage of body fat , fat weight, height, body mass index (BMI), height and resting calorie consumption data will be synchronized to HealthKit in. How to connect to Apple Health: 1. After install the Renpho Health App and log in successfully for the first time, a pop-up will prompt to ask whether to allow Renpho Health to access all your health data, please tap Allow in the upper right corner; 2. Open Apple Health, enter your profile, tap Apps> Renpho Health, tap Turn All Categories On; 3. After authorization, your Body Fat Percentage, Body Mass Index, and Lean Body Mass will be synchronized to Apple Health. PLEASE note: 1.When you have purchased one of our medical products (such as a blood pressure monitor), please consult your doctor if you experience any discomfort during use, and the data is for reference only. 2.Medical devices are only available in the USA and UK
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
Zustand
Victory Native
React Native Reanimated
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.
