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
CPAP Supply Tracker
Never run out of CPAP supplies again.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
4 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.
Build your own version
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/
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 CPAP Supply Tracker: 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
Add reminders for expiring supplies with notifications.
Assumption to check: Users often find it difficult to manage expiration dates effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate with HealthKit or Google Fit for better tracking.
Assumption to check: Limited integration with other health apps.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation with clearer labels and onboarding.
Assumption to check: Users report a lack of intuitive navigation.
Validate with people who use this workflow before building.
Hypothesis 4
Implement cloud syncing of data for better accessibility.
Assumption to check: The app does not support cloud backup.
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
Never run out of CPAP supplies again. CPAP Supply Tracker helps you stay on top of replacements, track what you have on hand, and know exactly what needs attention so you can focus on getting better sleep. NEVER MISS A REPLACEMENT Track masks, filters, tubing, and more with customizable schedules and reminders. TRACK YOUR INVENTORY Keep count of supplies you have on hand and get alerts when you are running low. SEE WHAT NEEDS ATTENTION Quickly view overdue items and upcoming replacements in one simple status screen. STAY INFORMED AT A GLANCE App icon badge alerts let you know when supplies need attention without opening the app. 100 PERCENT PRIVATE AND OFFLINE No accounts. No cloud sync required. Your data stays on your device. ONE-TIME PURCHASE No subscriptions or recurring fees. Pay once and use it forever. SIMPLE AND EASY TO USE No complicated setup. Add your supplies and start tracking in seconds. CPAP Supply Tracker is designed to make managing your CPAP supplies simple, reliable, and stress-free.
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
Zustand
FastAPI
Axios
react-navigation
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.
