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
City Discoverer Companion
City Discoverer Companion automatically detects and records every city and state you drive through — turning every road trip into a memorable adventure
$25.00 · In-app purchases
PRICE
$25.00
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 included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 City Discoverer Companion: 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 user profiles that save preferences and suggest personalized listings.
Assumption to check: Apps in the travel category often lack personalization features.
Validate with people who use this workflow before building.
Hypothesis 2
Use a simplified design with clear filters and recommendations.
Assumption to check: Existing apps can be confusing with too many options.
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate a robust in-app messaging feature for direct communication.
Assumption to check: Users often find it hard to communicate with hosts.
Validate with people who use this workflow before building.
Hypothesis 4
Streamline the booking flow to be quicker and more user-friendly.
Assumption to check: Booking experiences are often cumbersome and lengthy.
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
City Discoverer Companion automatically detects and records every city and state you drive through — turning every road trip into a memorable adventure. Just start a journey, drive, and let the app do the rest. AUTOMATIC CITY DISCOVERY Your phone's GPS identifies each city you enter in real time. No manual input needed. The app checks your location every 8-10 seconds during active journeys and uses reverse geocoding to identify the exact city and state you're passing through. MULTI-MODAL NOTIFICATIONS Never miss a discovery. When you enter a new city, you'll hear a voice announcement saying "Now entering [city], [state]," accompanied by a notification chime, a visual popup with the city name and current weather, and haptic feedback. BACKGROUND DISCOVERING Keep discovering even when the app is minimized. Enable background discovering in Settings to continue logging cities during your road trip without keeping the app on screen. You'll receive push notifications for each new city discovered in the background. JOURNEY HISTORY & DATA EXPORT Every journey is saved with a complete list of cities, timestamps, weather conditions, and visit counts. Export your travel history as CSV or JSON to keep a permanent record of your adventures. GLOBAL DISCOVERY LEADERBOARD See how your discoveries compare with travelers worldwide. Browse the Global Discovery database to see what cities other users have found across the country. PLACES OF INTEREST (Ultimate tier) Automatically discover nearby landmarks, heritage sites, tourist attractions, rest areas, and local specialties when you enter a new city. Choose your search radius (2, 3, 5, or 10 miles) and explore four categories of points of interest powered by OpenStreetMap data. WEATHER AT A GLANCE See current temperature, conditions, humidity, and wind speed for every city you discover, right on the discovery card. FREE TRIAL Try City Discoverer Companion free for 3 days with full access to all Premium features. No credit card required — just enter your name and email to get started. SUBSCRIPTION PLANS Premium — $24.99/month • Unlimited city discovering with real-time GPS detection • Voice announcements and sound alerts for new cities • Background discovering — keeps working when app is minimized • Complete journey history with timestamps and weather • Export travel data as CSV or JSON • Access to Global Discovery leaderboard • Auto-renews monthly. Cancel anytime in Settings > Subscriptions. Ultimate — $49.99/month • Everything included in Premium • Automatic Places of Interest discovery in every new city • Four categories: Heritage Sites, Tourist Attractions, Rest Areas & Services, Local Specialties • Configurable search radius: 2, 3, 5, or 10 miles • Powered by OpenStreetMap for comprehensive coverage • Auto-renews monthly. Cancel anytime in Settings > Subscriptions. HOW IT WORKS Log in with your access code (from free trial signup or subscription purchase) Tap "Start Discovering" to begin a journey Drive — the app automatically detects each city you pass through View your discoveries in real time with weather, voice alerts, and notifications Check your journey history and global leaderboard anytime PRIVACY & DATA City Discoverer uses your precise GPS location only during active journeys to detect cities. Raw GPS coordinates are not permanently stored — only city and state names are saved to your travel history. Location data is never shared with advertisers or data brokers.
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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 Native
Expo
Supabase
react-navigation
react-native-maps
zustand
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.
