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
BabyDrink
BabyDrink - Intelligent Breastfeeding Record Assistant
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 BabyDrink: 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
Implement a feature to allow users to rate and review drinks.
Assumption to check: Lack of user reviews or testimonials
Validate with people who use this workflow before building.
Hypothesis 2
Expand the drink types available for tracking.
Assumption to check: Limited drink types
Validate with people who use this workflow before building.
Hypothesis 3
Add notification reminders for parents to track hydration.
Assumption to check: No reminders for hydration
Validate with people who use this workflow before building.
Hypothesis 4
Incorporate visual elements like graphs to show hydration trends.
Assumption to check: No visual progress tracking
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
BabyDrink - Intelligent Breastfeeding Record Assistant BabyDrink is an intelligent breastfeeding record tool specially designed for new parents, helping you easily track your baby's feeding habits and scientifically arrange feeding plans. Core Features • Convenient Recording: Supports voice recording function, simply say the feeding situation and the feeding details can be recorded quickly without manual input • Intelligent Reminder: Based on the baby's feeding routine, automatically calculate the next feeding time and send reminder notifications, so you won't miss any feeding opportunities • Calendar View: A clear and visual monthly calendar interface, allowing you to easily view daily feeding records and understand your baby's feeding routine • Data Statistics: Automatically analyze baby feeding data, including average milk volume, feeding frequency, and feeding trends, to help you scientifically adjust feeding plans • Highly Customizable: Flexible settings for default feeding type, milk volume, duration, and interval, supporting personalized user experience • iCloud Sync: Data is automatically synchronized to all your devices, allowing the whole family to record and view the baby's feeding situation Make Parenting Easier BabyDrink focuses on providing a simple and intuitive user experience, with a carefully designed interface that allows you to easily operate even in the middle of the night while breastfeeding. Whether bottle feeding or breastfeeding, it can meet your recording needs. Start using BabyDrink, make scientific parenting easier, and give your baby the most comfortable feeding experience!
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
@react-navigation/native
axios
react-native-date-picker
@react-native-picker/picker
BUILD KIT DIFFICULTY
Intermediate
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.
