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
Lightning Tracker & Radar Map
Lightning Tracker & Radar Map helps you understand storm activity before it reaches you
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
98 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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
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/
Preview a sample Build Kit No email needed
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.
JavaScript is required to complete mailbox verification.
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 Lightning Tracker & Radar 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.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Provide advanced radar overlays and customization options.
Assumption to check: Limited radar features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement reliable push notifications with user-defined thresholds.
Assumption to check: Inconsistent notifications for severe weather
Validate with people who use this workflow before building.
Hypothesis 3
Add features that show historical lightning activity and patterns.
Assumption to check: Lack of detailed historical data
Validate with people who use this workflow before building.
Hypothesis 4
Offer an ad-free premium option with additional features.
Assumption to check: Ads can disrupt user experience
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
Lightning Tracker & Radar Map helps you understand storm activity before it reaches you. See live lightning, radar, alerts, saved places and forecast context in one focused weather safety app. Powered by NOAA GOES GLM and EUMETSAT MTG-I1 LI satellite data, Lightning Tracker shows recent lightning flashes on a fast map, clusters active strikes into storm zones, and helps you judge whether a storm is building, approaching or moving away. Coverage includes the Americas, Atlantic, Europe and Africa; features depend on supported coverage and data availability. USE IT BEFORE YOU GO OUT Check storms before golf, boating, hiking, school sports, outdoor work, road trips, camping, events and family time outside. Open the map, check the nearest activity, review the storm zone and decide whether to wait, move or seek shelter. LIVE LIGHTNING MAP Fresh strikes appear on the map with age and distance context. Zoom from a regional view down to the places that matter and keep watching as cells develop. STORM ZONES AND TRACKS Lightning clusters are grouped into storm zones so the map is easier to read. Track movement, intensity and projected paths instead of trying to interpret scattered strikes one by one. RADAR, HISTORY AND FORECAST Premium unlocks radar overlay, radar timeline playback, 24-hour lightning history and storm forecast context from NOAA SPC where available. See lightning and precipitation together for a clearer severe-weather picture. ALERTS FOR SAVED PLACES Set an alert radius around the places you care about. Free users can monitor one saved place with basic storm data; Premium adds push alerts, wider radius, more saved places, advanced storm data and an ad-free experience. 30-30 SAFETY TIMER Use the built-in timer to follow the 30-minute lightning safety rule after nearby activity. It gives you a simple outdoor-safety checkpoint when the sky is changing fast. Lightning Tracker is built for one practical question: how close is the storm, where is it moving and is it time to get inside? Terms: https://lightningtracker.app/terms Privacy: https://lightningtracker.app/privacy
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
expo-location
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.
