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
Terremoto - Earthquake
Terremoto helps you follow earthquake activity around the world with a clean, fast interface designed for real-time monitoring.
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 Terremoto - Earthquake: 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
Implement real-time updates and alerts with customizable settings.
Assumption to check: Users may lack timely push notifications for significant earthquakes.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance map with filter options for different earthquake magnitudes.
Assumption to check: Limited map interaction features.
Validate with people who use this workflow before building.
Hypothesis 3
Add a history tab for users to explore past earthquake events.
Assumption to check: No user-friendly way to view historical earthquake data.
Validate with people who use this workflow before building.
Hypothesis 4
Provide clear descriptions and benefits for premium features.
Assumption to check: In-app purchase options may not be clearly communicated.
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
Terremoto helps you follow earthquake activity around the world with a clean, fast interface designed for real-time monitoring. Use the interactive map to see where events are happening, switch to the list view to scan recent activity, and open detailed event pages for a closer look. With optional location access, Terremoto can also highlight earthquakes near you and show how far away they are. Terremoto includes flexible USGS feed filters, so you can browse the past hour, day, week, or month and choose the minimum magnitude that matters to you. Whether you want to keep an eye on nearby tremors or monitor major global events, the app makes it easy to move between broad scanning and detailed inspection. Features: - Real-time earthquake feeds powered by USGS - Interactive map with event markers and quick selection - Recent earthquake list with location, magnitude, time, and distance - Detailed event view with depth, coordinates, alert level, and tsunami warning - One-tap access to the official USGS event page - Feed filters for time range and minimum magnitude - iPhone and iPad support Terremoto does not require an account and keeps the experience focused on fast access to earthquake information.
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
axios
zustand
react-native-maps
@react-navigation/native
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.
