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
Hurricane Tracker
14 years of tracking storms on iOS! Hurricane Tracker launched in Aug 2009! Over 300,000 active users!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
45,203 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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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 Hurricane Tracker: 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 push notifications with customizable settings.
Assumption to check: Users report difficulty in getting timely alerts.
Validate with people who use this workflow before building.
Hypothesis 2
Provide an onboarding tutorial for map features and usage.
Assumption to check: Map features can be confusing to navigate.
Validate with people who use this workflow before building.
Hypothesis 3
Clarify the benefits of in-app purchases in the settings and during onboarding.
Assumption to check: In-app purchases not well explained.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize the app for faster load times and smoother transitions.
Assumption to check: App performance can lag during high traffic events.
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
14 years of tracking storms on iOS! Hurricane Tracker launched in Aug 2009! Over 300,000 active users! Hurricane Tracker is the most used & most comprehensive tracking app available on any platform. What makes Hurricane Tracker different from the others in the App Store: • Receive push alerts (by region) when a new storm forms or threatens landfall • 65+ maps/images • Current storm count widget • Audio Updates • In-depth written discussions and analysis from our team • Real-time National Hurricane Center Updates (All NHC advisories & maps) • Custom graphics from our team of experts. Exclusive “Alert Level” & “Impact Potential” maps. Not just basic NHC info. • Share information with friends/family via email, SMS, Facebook & Twitter • Super detailed tropical wave/invest information • Dozens of satellites • Much, much more! There's no other hurricane-tracking app out there that can match the amount of information you get-we guarantee it. Get the information you need to make informed decisions. Review our app store ratings for all versions over our 14 year history on the App Store. 4.8 star average! We charge for our app because it’s not just an automated product, our team is constantly creating graphics & writing detailed discussions to keep you informed. This is our full-time job - keeping you ahead of the storms. Hurricane Tracker covers The Gulf of Mexico, Caribbean, Atlantic Ocean & Eastern Pacific. Our app also covers any storms that may affect Hawaii. We DO NOT cover storms near Australia and the Western Pacific. "Hurricane Tracker for iPad" is also available as a stand-alone app with a separate fee. WHAT ARE THEY SAYING: *Houston Press: "Finally, there is Hurricane Tracker. This app may have the best interface of the bunch, with a sliding set of navigation buttons at the bottom of the screen. This one, unlike either of the others, has audio and video updates". *Email from Customer Scott DeLacy: "With the new maps under Outlook, you have SURPASSED everyone else out there...Hurricane Tracker is now British Virgin Islands Airways' primary tropical data source, No one comes close". *Valued Customer Ray 007: "As good a review as you can give a service!" *Valued Customer Dale Gattis: "I've been using this and Hurricane for the last two years and I have really come to rely on this app exclusively. Excellent!" CONTACT US WITH ANY QUESTIONS: Web: www.hurrtracker.com Email: [email protected] Twitter: @hurrtrackerapp (live, real-time updates) *Hurricane Tracker is a data-intensive application. A WiFi or strong cellular signal is recommended for the best experience.
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
Supabase
Axios
Zustand
React Navigation
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.
