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
QuakeInfo: Seismic Monitoring
QuakeInfo™: Stay informed about earthquakes in your neighborhood and around the world with this beautiful and intuitive app—now updated for iOS 26 with a fresh and gorgeous new look.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
6 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
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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 QuakeInfo: Seismic Monitoring: 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 set custom alert parameters based on their preferences.
Assumption to check: Limited customization options for alerts
Validate with people who use this workflow before building.
Hypothesis 2
Implement a user-friendly filtering system to help users find relevant data more easily.
Assumption to check: Overwhelming amount of data can confuse users
Validate with people who use this workflow before building.
Hypothesis 3
Add a feature to save and quickly access favorite earthquake monitoring locations.
Assumption to check: No option to save favorite locations
Validate with people who use this workflow before building.
Hypothesis 4
Include a section with resources and tips for earthquake preparedness and safety.
Assumption to check: Lack of educational resources about earthquakes
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
QuakeInfo™: Stay informed about earthquakes in your neighborhood and around the world with this beautiful and intuitive app—now updated for iOS 26 with a fresh and gorgeous new look. For over 15 years, QuakeInfo™ has been the go-to app for earthquake awareness. Whether you live in an earthquake-prone area or simply want to stay informed about seismic activity worldwide, QuakeInfo™ delivers the information you need in a clean, responsive and distraction-free interface. COMPREHENSIVE GLOBAL COVERAGE QuakeInfo™ pulls real-time data from two authoritative sources—the U.S. Geological Survey (USGS) and the European-Mediterranean Seismological Centre (EMSC)—giving you the most complete picture of seismic activity anywhere on Earth. STAY ALERT—NOTIFICATIONS FOR MAJOR QUAKES Receive notifications for significant earthquakes around the world. Stay informed when major seismic events occur. POWERFUL QUAKE LIST & INTERACTIVE MAP Browse recent earthquakes in a list view or explore them on a world map. Choose your preferred default view, and collapse list sections to focus on what matters most—especially helpful if you live where earthquakes are frequent. DETAILED EARTHQUAKE INFORMATION Tap any earthquake to see: • Regional map of the epicenter • Magnitude, depth, and elapsed time since the event • Date and time in your local timezone and UTC • Distance from population centers • Visual indicator showing proximity to populated areas • Tsunami warnings for oceanic earthquakes, with direct links to the NOAA Tsunami Warning System • Quick access to the official USGS webpage QUAKEINFO™ PREMIUM Unlock even more with a Premium subscription: • Nearby Earthquake Alerts: Get notified when earthquakes strike close to home • Location-Aware Features: See earthquakes highlighted in your vicinity with distance and bearing to every quake • Explore Nearby Seismic Activity: View earthquakes near any epicenter—adjust the search radius and look back as far as a year to understand regional seismic patterns • Extended Timeframes: Go beyond the last day—review earthquakes from the past week • Epicenter Timezone: See the local time at the earthquake's location • Distance to All Quakes: View how far you are from earthquakes anywhere in the world Your Premium subscription supports ongoing development and helps us deliver new features. "QuakeInfo™ Premium Monthly" and "QuakeInfo™ Premium Annual" subscriptions renew automatically every month or every year, respectively. Download QuakeInfo™ today and stay informed about earthquakes anywhere in the world! End User License Agreement: https://www.quakeinfo.app/eula Privacy policy: https://www.quakeinfo.app/privacy
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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 Native
Expo
react-navigation
axios
redux
socket.io
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.
