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
Holding Pattern Trainer
Save time and money on your instrument flight training by mastering IFR holding pattern entries at the comfort of your own mobile device.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.1
114 ratings · Top 30%
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's included16 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Holding Pattern Trainer: 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
Add gamification elements to enhance user engagement.
Assumption to check: Limited interactive features for users to practice holding patterns.
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate assessments and progress tracking.
Assumption to check: Lack of detailed feedback after exercises.
Validate with people who use this workflow before building.
Hypothesis 3
Expand the library of patterns and exercises.
Assumption to check: Not enough variety in training patterns.
Validate with people who use this workflow before building.
Hypothesis 4
Offer more flexible pricing options or trial periods.
Assumption to check: High subscription cost may deter users.
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
Save time and money on your instrument flight training by mastering IFR holding pattern entries at the comfort of your own mobile device. Make IFR flight training easier! Is the following scenario familiar? You receive a holding clearance from ATC, and only have a couple of minutes, sometimes only a few seconds, to choose the correct entry. By the time you've figured out what's going on, you've already passed the holding fix and don't know what to do next. If this sounds familiar, then you need not to worry. Confusion during holding entries happens to practically almost every new instrument student. Even instrument-rated pilots occasionally have the same problem — when they don't get enough practice. Holding Trainer solves this problem and as a result, cuts the time you have to spend on expensive flight and ground lessons. With Holding Trainer, you can practice on your own time and convenience, so that choosing the best holding entry in the air becomes a breeze. Features: -Entry Trainer - Drills you on choosing the best holding entry. Practice until choosing holding entries becomes second nature and impress your flight instructor with your skills. -Holding calculator. Solve and visualize any holding scenario by entering your current bearing to the fix and a outbound or inbound holding radial. -Holding tutorial - learn how to choose the best holding entry quickly and easily. Holding Trainer for iOS is a complete rewrite based on my popular Flash-based desktop Holding Trainer app available on pilotscafe.com. ***Don't get "stuck" next time you receive a holding pattern clearance!*** ---------------------------------- For only a fraction of the cost of one ground lesson with your flight instructor, you can practice this important instrument skill at your own pace and save hundreds of Dollars on figuring out holding entries in the air. This is a great tool for anyone training towards their instrument checkride, CFII, proficiency check, or simply trying to improve their holding patterns. ----------------------------------
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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 Navigation
Zustand
Expo AV
React Native Gesture Handler
Axios
BUILD KIT DIFFICULTY
Starter
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.
