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
squalls — Bermuda weather
squalls is the Bermuda weather app built on the data Bermudians actually trust.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
8 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
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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 squalls — Bermuda weather: 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
Use a more reliable weather API for better accuracy.
Assumption to check: Inaccurate weather data from unreliable sources
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize notifications and themes.
Assumption to check: Limited customization options for users
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline caching of weather data.
Assumption to check: No offline functionality
Validate with people who use this workflow before building.
Hypothesis 4
Optimize data handling and UI rendering.
Assumption to check: Performance issues with large data sets
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
squalls is the Bermuda weather app built on the data Bermudians actually trust. Live radar from the Bermuda Weather Service (BWS). Local forecasts that pick up showers and squalls global apps miss. Marine forecasts with wave heights and warnings. Local tides. Native iOS widgets. No ads, no accounts, no tracking. — LIVE RADAR — The BWS radar — from close-in over the island out to 500 km to show approaching weather. — LOCAL FORECASTS — Built on the BWS forecast, not a global model's best guess. Catches the small-scale showers and squalls global apps routinely miss. — MARINE FORECASTS — Wave heights inside and outside the reef. Live small craft, gale, storm, and hurricane warnings — with start and end times. High and low tide times for St. George's Harbour. — PUSH NOTIFICATIONS — Optional alerts when a new marine warning is issued. — SUN & MOON — Sunrise, sunset, day length. Moonrise, moonset, phase, illumination. — LOCK SCREEN + HOME SCREEN WIDGETS — Radar, satellite, current conditions and forecast. — PRIVACY — No accounts. No ads. No tracking across sites. squalls.app/privacy.html — BUILT FOR BERMUDA — Sources: Bermuda Weather Service, NOAA, Open-Meteo, NASA GIBS.
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
react-native-reanimated
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.
