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
Earthquake: Alerts & Map
The fastest way to know when the earth moves
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
3,296 ratings · Top 15%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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 Earthquake: Alerts & Map: 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
Enhance real-time data integration for better reliability.
Assumption to check: Alerts may not be timely or accurate
Validate with people who use this workflow before building.
Hypothesis 2
Simplify layout and improve information hierarchy.
Assumption to check: User interface can feel cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to set thresholds for alerts based on their preferences.
Assumption to check: Limited customization options for alerts
Validate with people who use this workflow before building.
Hypothesis 4
Provide better explanations and value for subscription tiers.
Assumption to check: In-app purchase options are unclear
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
The fastest way to know when the earth moves. Get real-time earthquake alerts from 10+ official seismic networks worldwide — free, focused, and built to respect your privacy. Trusted by millions since 2010. 4.7 stars from thousands of users who count on us when it matters. WHY EARTHQUAKE: - Real-time data from 10+ official sources (more than any other app) - Fast, focused, and lightweight — under 50 MB - No location tracking required to get global alerts - Built for iPhone, iPad, and Mac FREE FEATURES: - Live worldwide earthquake data delivered in seconds - Data from 10+ official agencies: USGS, EMSC, GeoNet (New Zealand), Natural Resources Canada, British Geological Survey, GFZ (Germany), INGV (Italy), KNMI (Netherlands), MNSS, OVSICORI (Costa Rica), and GeoScience Australia - Global alerts for any earthquake magnitude 5.0+ - Tsunami warnings - Volcanoes on the map - Sort by magnitude, location, or time - Search any earthquake in the list - Detailed map with color and size-coded pins - Map clustering for cleaner views during seismic swarms - Direct links to official reporting agencies - Optimized for iPhone, iPad, iPod Touch, and Mac PREMIUM: - Track individual earthquakes — get notified when shake maps are released, when magnitudes are revised, or when new aftershock data comes in - USGS Shake Map overlays on major quakes - Fine-tuned filtering by source, magnitude, distance, and time - Localized alerts customized to your region PRIVACY MATTERS: - No ad tracking SDKs in this app - No location required to use the app - You control what data is shared and when - Full privacy policy: https://static.app.mobeezio.com/earthquake/privacy.html WHO USES EARTHQUAKE: Geologists, geophysicists, first responders, expats with family in seismic regions, residents of California, Japan, Indonesia, Turkey, Italy, Chile, Mexico, the Philippines, and anyone who's ever asked "was that an earthquake?" WE LISTEN: Got a suggestion? We read every email and ship updates monthly. Reach us at [email protected] — usually within 24 hours. SUBSCRIPTION TERMS: Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID settings. Payment is charged to your iTunes account on confirmation of purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://static.app.mobeezio.com/earthquake/privacy.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
react-navigation
axios
zustand
react-native-maps
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.
