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
Deer Valley Ski Navigator
Deer Valley Ski Navigator – Ski with real audio navigation, just as easy as using GPS in your car
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
9 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 Deer Valley Ski Navigator: map the core Sports 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 maps and favorite trails
Assumption to check: Limited offline functionality
Validate with people who use this workflow before building.
Hypothesis 2
Add filter and search functionality for trails
Assumption to check: Difficulty in finding trails based on user preferences
Validate with people who use this workflow before building.
Hypothesis 3
Create a social feed to share experiences and tips
Assumption to check: No social features to connect with other skiers
Validate with people who use this workflow before building.
Hypothesis 4
Offer a one-time purchase option for premium features
Assumption to check: Subscription fatigue with too many in-app purchases
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
Deer Valley Ski Navigator – Ski with real audio navigation, just as easy as using GPS in your car. Created specifically for iPhone, Apple Watch, and AirPods/EarPods, it delivers the best user experience through seamless integration. Ski with confidence and never worry about ending up on an expert-only trail again! Navigate the slopes effortlessly with our premier trail maps, designed for persons who demand the best. - Seamless Exploration – Discover the finest open runs tailored to your skill level, from elegant green slopes to exhilarating double blacks. - Hands-Free Guidance – Immerse yourself in the moment with audio-guided navigation via AirPods, Apple Watch, or iPhone — so you can enjoy your leisure to the fullest. - Easy Performance Tracking – Monitor your top speed, average speed, heart rate, and run times with seamless Apple Watch and iPhone integration. - Instant Safety Access – A single touch connects you to ski patrol, ensuring peace of mind on every descent. - Live Weather Updates – Plan your day with real-time forecasts and mountain conditions. - Effortless Resort Living – Find the best dining, ski schools, luxury rentals, and hotels—all mapped with direct ski-trail access. - Friend Location Sharing - See where your friends are on the slopes — and navigate right to them. - Favorite Spots - Mark your hotel, parking, or any key location — and navigate to it anytime. The Deer Valley Ski Navigator is your key to a smooth, safe, and exciting ski leisure. Download the Deer Valley Ski Navigator app now for the best, safest, and most seamless ski experience! Note: This app provides hands-free trail navigation with voice prompts for Apple Watch, AirPods/EarPods, and iPhone. Using Apple Watch workout mode (integrated with HealthKit for heart-rate tracking), it delivers real-time guidance and skiing stats. GPS usage in the background may reduce battery life.
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
axios
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.
