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
My Lightning Tracker & Alerts
My Lightning Tracker is the best app for monitoring lightning strikes all around the world in close to real-time
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
65,473 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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Combine features and design from your favorite apps.
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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 included16 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 My Lightning Tracker & Alerts: 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 a more reliable push notification system.
Assumption to check: Notifications can be inconsistent and delayed
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to set more detailed alert parameters.
Assumption to check: Limited customization options for alerts
Validate with people who use this workflow before building.
Hypothesis 3
Simplify UI for better user engagement.
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 4
Offer a clearer value proposition for premium features.
Assumption to check: In-app purchases for advanced features can frustrate users
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
My Lightning Tracker is the best app for monitoring lightning strikes all around the world in close to real-time. With a sleek modern design, you can watch thunderstorms as they occur. You can also receive notifications whenever strikes are detected in your area. - Detects and displays lightning strikes all around the world! - See a history of hotspots where lightning strikes occur most often! - View more detailed information about where the thunderstorm is occurring on a map. - Receive a lightning alarm when a storm is nearby so that you can monitor it live. - Share a strike with your friends so that they can see where the thunder & lightning is occurring too! - Monitor the weather radar to track what could be coming. - Full support for the latest iPhone and iPad models. If you want the most efficient way of keeping up lightning strikes and thunderstorms, then My Lightning Tracker is the right lightning network for you. This version is ad-supported and is similar to apps such as Blitzortung, Clime, Spark and Live Lightning.
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
Zustand
Supabase
react-navigation
@react-native-community/geolocation
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.
