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
World Travel Guide Offline
Get comprehensive information on 20,000 travel destinations worldwide
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
2 ratings · Top 15%
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 World Travel Guide Offline: 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
Ensure all essential features work offline.
Assumption to check: Limited offline functionality for certain features.
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate a review system for destinations.
Assumption to check: Lack of user-generated content or reviews.
Validate with people who use this workflow before building.
Hypothesis 3
Implement a guided tutorial for first-time users.
Assumption to check: Difficult navigation for new users.
Validate with people who use this workflow before building.
Hypothesis 4
Establish a reliable system for updating travel information regularly.
Assumption to check: Inconsistent updates on travel information.
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
Get comprehensive information on 20,000 travel destinations worldwide. No Internet connection is required – all the data is stored within the app, so you can access it in the most remote places and avoid expensive phone charges. Explore all the major cities, discover places off the beaten track, and learn about everything in between. Use the guide for information on history, culture, attractions, sights, hotels, bars, restaurants, nightlife, entertainment, transportation, and much more. Follow links to thousands of useful websites. Access a handy phrasebook for many languages around the world to make communication easier. Add your own notes to each location and keep a list of your favorite places for easy access. Explore locations on an offline world map. Backup and sync your favorites and notes between devices. Be sure to load it up on your iPod, iPhone, or iPad for your next travel adventure – it’s the only guide you’ll ever need. Note because this is the whole world offline, the app requires 700MB on your device. Please make sure you have enough free space before downloading. If the app doesn’t fully download, click and hold the icon to delete it then clear up some space on your device and download again.
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
date-fns
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.
