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
Piper PA-44 Training
The Piper PA-44 Training is an innovative new way to study aircraft systems and limitations
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
381 ratings · Top 5%
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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What's included17 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 Piper PA-44 Training: map the core Education 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 offline downloads for lessons and quizzes.
Assumption to check: Limited offline access to materials
Validate with people who use this workflow before building.
Hypothesis 2
Enable cloud sync for user progress.
Assumption to check: No progress tracking across devices
Validate with people who use this workflow before building.
Hypothesis 3
Introduce a subscription model for ongoing content updates.
Assumption to check: Static content without updates
Validate with people who use this workflow before building.
Hypothesis 4
Add gamification elements like quizzes, badges, and leaderboards.
Assumption to check: Lack of interactive learning 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
The Piper PA-44 Training is an innovative new way to study aircraft systems and limitations. System description sections take the main information from the POH and organizes in easy to navigate chapters. Interactive diagrams for the major systems allow the user to tap on various switches, levers, circuit breakers, and buttons and watch how those inputs change the diagram. Users can practice normal and emergency operations, correlating practical knowledge with the POH descriptions. Descriptions and limitations are also noted for various parts of each system throughout the diagram. The interactive cockpit poster allows you to view the entire cockpit with a highly detailed illustration. If you tap on a part of the cockpit you will see an in-depth description of that part of the cockpit. DISCLAIMER: The Piper PA-44 Training App is to be used as a reference only and cannot be used for flight or to replace formal training.
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-video
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.
