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
Hail Drive
Take Hail Drive into the field to review storm activity, check properties faster, generate address reports, and stay on top of hail and wind alerts.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 5.0
2 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 Hail Drive: 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 alert types and thresholds.
Assumption to check: Limited customization options for alerts
Validate with people who use this workflow before building.
Hypothesis 2
Include historical weather data for better user insights.
Assumption to check: No historical weather data
Validate with people who use this workflow before building.
Hypothesis 3
Improve location detection accuracy with user input options.
Assumption to check: Inaccurate location detection
Validate with people who use this workflow before building.
Hypothesis 4
Add features like weather-related news or tips to keep users engaged.
Assumption to check: Lack of user engagement features
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
Take Hail Drive into the field to review storm activity, check properties faster, generate address reports, and stay on top of hail and wind alerts. Take Hail Drive into the field to review storm activity, search properties, generate address reports, and stay on top of hail and wind alerts. Hail Drive is the mobile app for Hail Drive customers. Sign in with your existing account to access interactive storm maps, storm-date history, address-level storm context, alerts, and field workflow tools from your phone. Features may vary by plan, workspace role, and account configuration. Use Hail Drive to review radar-derived hail swaths, recent storm reports, and hail, wind, tornado, and related storm context across supported storm days. Supported accounts can search addresses, review property-level storm history, and generate shareable PDF address reports. Hail Drive also supports native storm alerts so your device can receive hail, wind, tornado, and related storm notifications as new activity is processed. Hail Drive includes Knock Mode in the in-app map experience. Knock Mode lets users save properties from the map, log visit outcomes, schedule follow-ups, review daily activity, and work in personal or company workspaces. Eligible company accounts may also have access to teammate management, templates, photos, signatures, and supported third-party workflow integrations. Hail Drive is for existing accounts. Account setup and subscription management are handled through the Hail Drive website. Features • Sign in with Apple, Google, or email using an existing Hail Drive account • Interactive storm map with hail and wind views • Storm-date browsing for current and historical supported storm days • Radar-derived hail swaths with recent storm report context • Wind, tornado, and storm context overlays • Optional location access to center the map and improve nearby workflows • Address search and property-level storm context • Shareable PDF address reports • Native hail, wind, tornado, and storm alerts • In-app access to support, privacy policy, terms, and account deletion • Knock Mode: save properties, log outcomes, manage follow-ups, and review daily activity • Personal and company workspaces with role-based access for eligible accounts
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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 Navigation
Axios
React Native Maps
Expo Location
@react-native-async-storage/async-storage
OpenWeather API
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.
