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
Halo Weather: Weather Forecast
Check the weather before you head out!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.2
71 ratings · Top 30%
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 included16 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Halo Weather: Weather Forecast: 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
Allow users to customize notification types and sounds.
Assumption to check: Limited customization options for notifications
Validate with people who use this workflow before building.
Hypothesis 2
Implement a manual location input feature for user accuracy.
Assumption to check: Inaccurate location detection sometimes
Validate with people who use this workflow before building.
Hypothesis 3
Offer a more user-friendly ad experience or an ad-free subscription option.
Assumption to check: Overwhelming ads for free users
Validate with people who use this workflow before building.
Hypothesis 4
Create a dedicated alerts screen with clear, actionable information.
Assumption to check: Lack of user-friendly interface for severe weather alerts
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
Check the weather before you head out! Halo Weather puts you in control of every storm — your personal weather expert, at your service anytime, anywhere. Get precise, minute‑by‑minute rain alerts so you can prepare with ease. From daily travel planning to severe weather warnings, we deliver the latest weather information to keep you safe. Key Features ‑ Rain Alerts: Track the start and end times of rain down to the minute. ‑ Hourly Forecasts: Plan your week with confidence. ‑ Future Weather: Provide a 10‑day weather forecast, including temperature, humidity, visibility, air pressure, precipitation probability, storms, sleet, and more. ‑ Severe Weather Warnings and Alerts: Get advance notice of severe weather conditions in your area. ‑ Air Quality Index: View real‑time Air Quality Index (AQI) and pollutant levels to protect your health. ‑ Home Screen Widget: Check the weather without opening the app. ‑ Detailed Data: Access sunrise and sunset times, wind speed, air pressure, UV index, and more. ‑ Over 7,000 Cities Worldwide: Stay updated on local weather anytime, anywhere. Whether you're commuting, traveling, or planning a weekend hike, Halo Weather provides accurate and timely weather forecasts to help you make informed decisions. Download now and stay ahead of the weather. Subscription • Auto‑renewal: Payment will be charged to your Apple ID upon confirmation of purchase. Your subscription will automatically renew unless auto‑renewal is turned off at least 24 hours before the end of the current billing cycle. Your account will be charged for renewal within 24 hours prior to the end of the current cycle. • Cancellation and Management: You can manage and cancel your subscription via your Account Settings in the App Store after purchase. Terms of Service: https://www.sunnyweathermini.com/termsOfService.html Privacy Policy: https://www.sunnyweathermini.com/privacyPolicy.html
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
axios
react-navigation
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.
