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
Grand Canyon & Flagstaff Guide
The GRAND CANYON & FLAGSTAFF GUIDE helps you make the most of this premier US National Park and its Arizona gateway towns: Tusayan, Williams and Flagstaff
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
6 ratings · Top 5%
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 Grand Canyon & Flagstaff 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
Implement offline caching for attraction data.
Assumption to check: Limited offline access to content
Validate with people who use this workflow before building.
Hypothesis 2
Use user data to suggest attractions.
Assumption to check: Lack of personalized recommendations
Validate with people who use this workflow before building.
Hypothesis 3
Integrate in-app navigation for easier access.
Assumption to check: No in-app navigation for the map
Validate with people who use this workflow before building.
Hypothesis 4
Offer subscription models for ongoing access.
Assumption to check: High price for a single purchase
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
The GRAND CANYON & FLAGSTAFF GUIDE helps you make the most of this premier US National Park and its Arizona gateway towns: Tusayan, Williams and Flagstaff. Written by a pro author, all content (150+ points-of-interest and uses 215+ pics) is original & independent; no recommendations are ads! —— *** This app is ad-free and subscription-free: the single-one-off purchase also includes free updates in the future. Published by TouchScreenTravels.com: Travel guides for the digital age. Our Touch, Your Travels. *** —— The GRAND CANYON & FLAGSTAFF GUIDE starts with essential TRIP-PLANNING information and an overview of key DESTINATIONS so you can decide where to stay. The hand-crafted ITINERARIES & TOURS section then offers a selection of suggestions on how to spend your time using a series of easy-to-follow day-trips. Or just dive right into the SIGHTS & ACTIVITIES section. This provides backgrounders on ART, & HISTORY; makes suggestions for traveling with KIDS & FAMILIES; and includes a run-down of the region’s best HIKES, CYCLE RIDES and WINTER SPORTS. Finally the app details many good places to EAT & DRINK to ensure the perfect trip. —— TRIP ESSENTIALS • Accommodation • Costs • Seasons • Transport DESTINATIONS • Coconino National Forest • Flagstaff • Grand Canyon North Rim • Grand Canyon South Rim • Tusayan • Williams ITINERARIES & TOURS • Around The Peaks Drive • Flagstaff In-A-Day • The North Rim In-A-Day • South Rim: Desert View In-A-Day • South Rim: Hermit Road In-A-Day • Tuweep (Toroweap). SIGHTS & ACTIVITIES • Art • Cycling • Fishing • Hiking • History • Kids & Families • Natural History • Winter Sports • Sunrise & Sunset EAT, DRINK & SHOP • Bars • Restaurants • Shops & Shopping —— APP FEATURES: TECHNICAL • NAVIGATE quickly using the app's many image buttons; a global search; and internal hyperlinks. • LOCATION info (using your device's GPS). • Detailed OFFLINE MAPS and the ability to ADD YOUR OWN markers. • Save and share FAVOURITES. • One-click website LINKS. • One-click PHONE CALLS (on phones). • Easily CONTACT the author. —— CREDITS AUTHOR: George Miller, an environmental photojournalist, has been writing nature and travel-oriented books and articles for more than two decades. He regularly contributes travel articles and photography to magazines and newspapers across the nation. He taught photography programs and college ecology-geology classes at the Grand Canyon. He has written ten books, seven wildflower guides, an iBook, six apps, and traveled extensively throughout the western U.S. See his articles, photography and books on his websites, travelsdujour.com and wildflowerstx.com. ICON: LWYang@Flickr —— REVIEWS & RATINGS Reviews and ratings are like gold dust to small developers like us, if you like the app please go back into the app store, find it and leave a review or just a rating. It really helps us. Thanks.
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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
Axios
MapView
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.
