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
LineWatch+
LineWatch+ helps you spend less time waiting and more time riding
$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'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 LineWatch+: map the core Travel 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 robust review system with user verification.
Assumption to check: Lack of user reviews can lead to poor trust in the app.
Validate with people who use this workflow before building.
Hypothesis 2
Provide more detailed line information and live updates.
Assumption to check: Limited information on lines can frustrate users.
Validate with people who use this workflow before building.
Hypothesis 3
Clearly define benefits for premium features and offer trials.
Assumption to check: In-app purchase value is unclear.
Validate with people who use this workflow before building.
Hypothesis 4
Create a better trip management interface with reminders and notifications.
Assumption to check: Difficulties in managing multiple trips.
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
LineWatch+ helps you spend less time waiting and more time riding. Track live wait times, view forecasted wait trends, get walking directions, and receive alerts when lines drop at supported theme parks. Features Real-time wait times for attractions at supported parks Forecasted wait trends by time of day for supported attractions Walking directions to attractions in the app Custom alerts when wait times drop below your selected threshold Track multiple attractions at once Fast, battery-efficient performance How it works Choose the attractions you want to watch Set your target wait time Follow directions and get notified when waits get shorter Built for visitors who want a smoother park day without constantly refreshing wait times. Data & Disclosure LineWatch+ is an independent app for theme park visitors. Wait-time data is provided by Queue-Times.com. LineWatch+ is not affiliated with or endorsed by any theme park operator.
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
Redux
React Navigation
Axios
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.
