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
ABGs NOW! Tic-Tac-Toe
ABGs NOW! Tic-Tac-Toe is a fun, interactive way to learn arterial blood gases! It provides two modes, challenge and practice, that use helpful colors and icons to guide you through the tic-tac-toe method
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 1.0
1 ratings · Below Average
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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Combine features and design from your favorite apps.
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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 ABGs NOW! Tic-Tac-Toe: 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
Integrate quizzes or explanations of ABG values after each game.
Assumption to check: Limited educational value compared to traditional methods
Validate with people who use this workflow before building.
Hypothesis 2
Revamp the design to include more interactive elements and animations.
Assumption to check: UI is not engaging or modern
Validate with people who use this workflow before building.
Hypothesis 3
Implement clear game rules and consistent scoring methods.
Assumption to check: Inconsistent game logic and scoring
Validate with people who use this workflow before building.
Hypothesis 4
Add a feedback system and tutorial for new users.
Assumption to check: Lack of user feedback and support
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
ABGs NOW! Tic-Tac-Toe is a fun, interactive way to learn arterial blood gases! It provides two modes, challenge and practice, that use helpful colors and icons to guide you through the tic-tac-toe method. The app has three modes to help you in your mastery of ABGs interpretations. Challenge Mode Features: * Drag pieces to make Tic-Tac-Toe boards based on a given ABG outcome * Score points for each correctly placed piece * Misses result in decreased point values for the current interpretation * Game is over when the timer expires. Flash Card features: * Flash card is presented with a random set of values to interpret. * Tap card to reveal a detailed explanation of the correct answer. Practice Mode Features: * Drag and drop the ABG values to make a tic-tac-toe * Determine the cause * Decide if there's any compensation A final review gives you helpful feedback before going to the next problem. It's that easy! This app will not only save you time, but lots of scrap paper, too!
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
Redux
react-navigation
@react-native-async-storage/async-storage
expo-av
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.
