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
Flight Instruments
Attitude Indicator and other key flight instruments on your iPhone or iPad, using built-in gyros and GPS.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.6
5 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.
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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 included14 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 Flight Instruments: 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
Integrate more advanced features like weather overlays and real-time flight tracking.
Assumption to check: Limited functionality compared to dedicated aviation instruments
Validate with people who use this workflow before building.
Hypothesis 2
Create a more user-friendly and visually appealing design.
Assumption to check: Poor user interface and navigation
Validate with people who use this workflow before building.
Hypothesis 3
Ensure data accuracy by integrating reliable APIs for flight information.
Assumption to check: Inaccurate data for some users
Validate with people who use this workflow before building.
Hypothesis 4
Offer a free tier with basic functionalities to attract more users.
Assumption to check: High price for limited 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
Attitude Indicator and other key flight instruments on your iPhone or iPad, using built-in gyros and GPS. Key features: -Attitude Indicator using solid state gyros in your iPhone with extreme attitude chevrons to guide you back to a safety if you find yourself in an unusual attitude -"Glass cockpit" Primary Flight Display using digital tapes for Speed, Altitude, Heading, Vertical Speed, Rate of Turn and slip indicator -Position relative to nearest airport in plain English (convenient for ATC position reports), with communication frequency where available -Fully configurable display, with landscape mode and choice of aviation or metric units -Continuous auto-calibration feature adapts to different airplane environments and flying conditions This app is not FAA approved and should not be used for navigation. All information is presented for reference only, and BBFlight is not responsible for any damage, injury or death resulting from the use of this application: you assume total responsibility and risk associated with this application
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
FastAPI
react-navigation
react-native-maps
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.
