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
Surf-Forecast.com
Surf-Forecast.com gives you simple, accurate and easy-to-read surf forecasts so you have the best chance of hitting those breaks when the waves are pumping.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
961 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 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 Surf-Forecast.com: map the core Weather 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
Add a feature to suggest popular surf spots based on user location.
Assumption to check: Limited location options for surf forecasts
Validate with people who use this workflow before building.
Hypothesis 2
Provide clear explanations and benefits for subscription tiers.
Assumption to check: In-app purchases can be unclear
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize notification preferences for alerts.
Assumption to check: Push notifications can be overwhelming
Validate with people who use this workflow before building.
Hypothesis 4
Implement caching for frequently accessed data to improve performance.
Assumption to check: Loading times can be slow when fetching data
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
Surf-Forecast.com gives you simple, accurate and easy-to-read surf forecasts so you have the best chance of hitting those breaks when the waves are pumping. Built by surfers, for surfers, and trusted by millions of surfers for over 20 years, our updated app lets you see all your favorite surf spots at a glance. Providing detailed surf forecasts for over 7,000 breaks worldwide, our new features let you see further ahead than ever before - giving you plenty of advance warning for when those swells start coming in. Find the best surfing conditions near you and use the rating tool to find exactly when to go. – FREE App Features ⁃ Detailed surf forecasts ⁃ Wavefinder map ⁃ Live webcam links ⁃ Multi-swell component presentation ⁃ Tide times ⁃ Detailed mapping to locate nearby breaks – Surf Premium Benefits ⁃ Access to the full 16 days of our new Wavefinder feature ⁃ Hourly forecasts ⁃ 16 day forecasts ⁃ Custom surf alerts ⁃ Ad-free browsing on our website So what are you waiting for? Grab your board and get exploring. We’ll see you out there! For the full Terms and Conditions of this service please visit: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
Zustand
Axios
React Navigation
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.
