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 Port Guide
Going on a Cruise? Need help with what to do in port? Cruise Port Guide has you covered!
$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 Cruise Port Guide: 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
Provide comprehensive guides with user reviews and local tips.
Assumption to check: Limited information on ports can frustrate users.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more intuitive navigation system.
Assumption to check: Difficulty in navigating between screens.
Validate with people who use this workflow before building.
Hypothesis 3
Enable offline caching of essential data.
Assumption to check: No offline access to port information.
Validate with people who use this workflow before building.
Hypothesis 4
Encourage users to submit reviews and photos for each port.
Assumption to check: Lack of user-generated content (reviews, photos).
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
Going on a Cruise? Need help with what to do in port? Cruise Port Guide has you covered! Includes ports in: Africa & The Middle East - Bahrain, Oman, Qatar, UAE Asia - Japan, Philippines, Singapore, South Korea, Taiwan, Vietnam Europe - Belgium, Denmark, Estonia, Finland, Norway, Portugal, Spain, Sweden North America - The Caribbean & Overseas Territories South America - COMING SOON Oceania - COMING SOON Find the information you need while in port: Local area map, Tours, Tourist Bus, Walking tours, Museums, Markets, Public Transport and so much more. ----------- More ports will be added so have a look on our socials for updates. Please don't hesitate to contact us if you want any other features added. * Requires an internet connection (3G/4G/5G/WiFi) to access website links, once downloaded will work in airplane mode ----------- v1.3 The Caribbean: Antigua & Barbuda - St Johns Bahamas - Bimini Island - CocoCay Island - Disney Castaway Cay - Disney Lighthouse Point - Free Port - Half Moon Cay - Nassau - Great Stirrup Cay - Ocean Cay - Princess Cay Barbados - Bridgetown Dominica - Roseau Dominican Republic - La Romana - Puerto Plata Grenada - St Georges Haiti - Labadee Jamaica - Falmouth - Montego Bay - Ocho Rios Saint Kitts & Nevis - Basseterre St Kitts St Lucia - Castries St Vincent Granadines - Kingstown Trinidad & Tobago - Port of Spain - Scarborough ----------- v1.2 Middle East: Bahrain - Manama Oman - Muscat Qatar - Doha UAE - Abu Dhabi - Dubai - Sir Bani Yas Island ----------- v1.1 Asia: Japan - Akita - Fukuoka - Hakodate - Ishigaki - Kanazawa - Okinawa, Naha - Yatsushiro - Yokohama Philippines - Manila - Puerto Princesa Singapore - Singapore South Korea - Busan - Jeju Taiwan - Hualien - Keelung Vietnam - Nha Trang - Phu My ----------- v1.0 Europe: Belgium - Antwerp - Ostend - Zeebrugge Denmark - Copenhagen - Skagen Estonia - Tallinn Finland - Helsinki Norway - Alesund - Andalsnes - Bergen - Bodo - Eidjford - Flam - Geiranger & Hellesylt - Haugesund - Honningsvag Nordkapp - Kristiansand - Maloy - Molde - Narvik - Olden Nordfjorn - Oslo - Stavanger - Tromso - Trondheim Portugal - Funchal, Madeira - Lisbon Spain - Alicante - Almeria - Barcelona - Bilbao - Cadiz - Cartagena - Ibiza - Las Palmas, Gran Canaria - Mahon, Menorca - Malaga - Palamos - Palma de Mallorca - Tenerife - Valencia - Vigo Sweden - Stockholm - Visby
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.
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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.
