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
Cruise Ship Tracker
Your Complete Cruise Companion
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.3
235 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 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 Cruise Ship Tracker: 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 better tracking algorithms or integration with live data sources.
Assumption to check: Limited real-time tracking accuracy
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the design and enhance information hierarchy.
Assumption to check: Cluttered user interface
Validate with people who use this workflow before building.
Hypothesis 3
Provide real-time updates for itineraries and changes.
Assumption to check: Infrequent updates on itineraries
Validate with people who use this workflow before building.
Hypothesis 4
Add social features for users to share experiences and reviews.
Assumption to check: Lack of user engagement 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
Your Complete Cruise Companion Track any cruise ship across the globe in real-time. CruiseKick puts the entire cruise world at your fingertips—from live ship positions to port webcams to your personal cruise logbook. LIVE SHIP TRACKING Follow ships from every major cruise line as they sail the seas. See exact positions on the map, current speed, heading, and voyage details. Discover nearby vessels and watch ships arrive and depart from ports around the world. CRUISE PORTS WORLDWIDE Explore thousands of cruise ports with detailed information, docked ships, and live webcams. Preview your next destination before you arrive or check conditions at ports across the globe. Save your favorite ports for quick access. MY CRUISES LOGBOOK Log your past voyages and plan future adventures. Keep a complete record of your cruise history—ships, dates, destinations, and memories. Add upcoming cruises and watch the countdown to your next departure. COUNTDOWN WIDGETS Add beautiful countdown widgets to your home screen. See exactly how many days until your next cruise at a glance. Customize with different styles and watch the excitement build as departure day approaches. CRUISE PLANNING TOOLS Stay organized with built-in to-do lists and planning checklists. Create custom lists for packing, shore excursions, or anything you need. Never forget an important task before you set sail. WEATHER & CONDITIONS Check real-time weather for any ship at sea, including temperature, wind, and wave height. Perfect for tracking conditions on your upcoming voyage or following friends and family. MORE FEATURES • Powerful search to find any cruise ship instantly • Save favorite ships for quick access • Dark mode for comfortable nighttime browsing • Beautiful design crafted for iOS Whether you're tracking a loved one at sea, planning your next voyage, or simply dreaming of the open ocean, CruiseKick is the ultimate app for cruise enthusiasts. Download now and start exploring! EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://velocityraptor.co/app-privacy
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
react-navigation
axios
react-native-maps
expo-location
BUILD KIT DIFFICULTY
Advanced
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.
