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
ABG Pro Arterial Blood Gas
ABG Pro can help you interpret acid base disorders based on the arterial blood gas analysis
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.0
46 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 included16 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 ABG Pro Arterial Blood Gas: 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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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 more detailed explanations and examples.
Assumption to check: Limited guidance on understanding results.
Validate with people who use this workflow before building.
Hypothesis 2
Make the purchase process smoother and less annoying.
Assumption to check: In-app purchase notifications can be intrusive.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize performance for heavy calculations.
Assumption to check: Occasional crashes with complex calculations.
Validate with people who use this workflow before building.
Hypothesis 4
Redesign with modern UI components for better user experience.
Assumption to check: User interface can feel outdated.
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
ABG Pro can help you interpret acid base disorders based on the arterial blood gas analysis. Arterial blood gas is perhaps one of the most important test in the critically ill patient and can often be challenging to interpret. With the ABG Pro pocket tool you get fast help with an intuitive user-interface and a simple diagnostic rapport. ABG Pro also includes an Anion Gap calculator and handles situations with ketoacidosis as well as lactate acidosis. GET IT NOW You will need this app if you work in internal medicine, anaesthesiology, intensive care, emergency medicine, cardiology, pulmonology and many other specialities. THE EASY AND FAST ABG CALCULATOR This app is intended for educational purposes only. No clinical decisions should be made based on the calculations in this app.
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
Axios
React Navigation
react-native-async-storage
shadcn/ui
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.
