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
SkiMaps - Download Trail Maps
Going skiing or snowboarding this winter? Download trail maps from your favourite ski resorts to your iPhone and use the built-in GPS to find your way around the slopes or track your activities.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.9
7 ratings · Top 50%
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 included18 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 SkiMaps - Download Trail Maps: 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
Incorporate user-generated content or community-sourced updates.
Assumption to check: Limited map updates and coverage for ski trails
Validate with people who use this workflow before building.
Hypothesis 2
Optimize app performance and ensure compatibility with older devices.
Assumption to check: Frequent crashes or performance issues on older devices
Validate with people who use this workflow before building.
Hypothesis 3
Simplify navigation and enhance UI design for better usability.
Assumption to check: Difficult navigation and UI clutter
Validate with people who use this workflow before building.
Hypothesis 4
Implement in-app support chat and better feedback mechanisms.
Assumption to check: Inadequate customer support and response times
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 skiing or snowboarding this winter? Download trail maps from your favourite ski resorts to your iPhone and use the built-in GPS to find your way around the slopes or track your activities. The best thing is that you don't need an active internet connection, just download the maps you'll need in advance and everything you need on the slopes is right there on your iPhone. If you do have an internet connection available however, you can display webcams from Windy.com on the piste maps or check the weather forecast at your favourite resort. SkiMaps is now also available on iPad, a great tool for making plans for your next trip! Some of the available ski areas are: Espace Killy (Tignes & Val d'Isère - France) Les 3 Vallées (Val Thorens, Meribel, Courchevel,... - France) Portes du Soleil (Morzine, Avoriaz, Les Gets,... - France & Switzerland) Paradiski (Les Arcs, La Plagne,... - France) Chamonix - Mont Blanc (France) St. Anton am Arlberg (Austria) Le Grand Masif (Flaine, Samoëns,... - France) Alpe d'Huez (France) Les 4 Vallées (Switzerland) Les Deux Alpes (France) Ischgl (Austria) Whistler Blackcomb (Canada) Zell Am See - Kaprun (Austria) Zermatt & Cervinia (Switzerland & Italy) ... and more! For a complete list of maps, please check our website.
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
react-native-maps
@react-native-community/async-storage
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.
