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
Fly Baby: Navigate in Style
Fly Baby is a set of premium cockpit navigation instruments and waypoint info that stays on your wrist wherever you go, giving you the ability to navigate to any destination across the planet or in your local practice area
$2.99 · In-app purchases
PRICE
$2.99
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.
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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 Fly Baby: Navigate in Style: map the core Navigation 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 reliable traffic data API to enhance user navigation.
Assumption to check: Navigation apps often struggle with real-time traffic updates.
Validate with people who use this workflow before building.
Hypothesis 2
Create a user-friendly offline map download feature.
Assumption to check: Offline maps can be cumbersome to download.
Validate with people who use this workflow before building.
Hypothesis 3
Use high-quality text-to-speech for clearer directions.
Assumption to check: Voice navigation can lack clarity or accuracy.
Validate with people who use this workflow before building.
Hypothesis 4
Offer better organization features for saved locations.
Assumption to check: Users often find it hard to manage saved places.
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
Fly Baby is a set of premium cockpit navigation instruments and waypoint info that stays on your wrist wherever you go, giving you the ability to navigate to any destination across the planet or in your local practice area. Built for VFR pilots and fans of flying, Fly Baby includes a traditional HSI (horizontal situation indicator) and RMI (radio magnetic indicator) that is easy to read and uses the device GPS to give accurate sub-second indications. The instruments have been designed to look great on your wrist while also offering the most accurate information at a glance. Set the destination using the worldwide database, which includes airports, heliports, seaplane bases, gliderports, balloonports, ultralight fields, hang glider fields, even VORs, NDBs and some localizers! No matter your flight destination, FlyBaby can help point the way. Use it as backup navigation for your traditional VFR techniques such as pilotage and dead reckoning. Get there and look good while doing it! Note: All displayed bearings are magnetic courses with magnetic declination already factored in. This is different than true course, which does not account for current magnetic declination.
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
react-navigation
axios
expo-location
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.
