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
FeverSafe: Sick Child Tracker
stop guessing at 3 am.
$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 FeverSafe: Sick Child 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
Incorporate push notifications for medication reminders.
Assumption to check: Lack of user engagement features such as reminders.
Validate with people who use this workflow before building.
Hypothesis 2
Add progress charts for symptoms and medications.
Assumption to check: Limited data visualization for tracking health over time.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to add multiple children profiles.
Assumption to check: Difficulties in managing multiple children’s health data.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce social features like sharing progress with family.
Assumption to check: No community or support features.
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
stop guessing at 3 am. special launch offer: 50% off for a limited time. lock in lifetime access now. when your child is burning up and you haven't slept, memory is unreliable. did you give the ibuprofen at 10 pm or 11 pm? is it safe to give tylenol now? feversafe answers these questions instantly. why parents love feversafe: prevents double-dosing the button stays locked until the next safe dose. our visual countdowns show exactly when it is safe to administer medication again (6h for ibuprofen, 4h for acetaminophen). designed for "parent brain" no tiny menus. no complex accounts. just huge, high-contrast buttons you can hit in the dark with one hand while holding a crying baby. doctor-ready timeline when the pediatrician asks, "how long has the fever lasted?", don't fumble. show them a clean, professional history of every temp and dose. key features: visual safety locks: instantly see if you need to wait or if you are ready. multi-child support: switch between liam and emma instantly. privacy first: all data stays on your phone. no cloud, no accounts, no tracking. offline ready: works perfectly without wi-fi. one price, lifetime peace of mind. unlike other apps that charge monthly subscriptions, feversafe is a single, honest purchase. download now to secure the launch price! disclaimer: this app is for tracking purposes only and does not provide medical advice. always consult a doctor for high fevers or concerning symptoms.
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
react-navigation
react-native-chart
Zustand
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.
