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.
Know when lightning is about to hit — before it does.
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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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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Generating… usually about a minute.
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for Lightning Tracker and 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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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
Assumption to check: Inaccurate lightning strike data
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Delayed alerts
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Limited customization options
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Cluttered UI
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Know when lightning is about to hit — before it does. My Lightning Tracker puts real-time lightning strike data right on your map. The moment a bolt touches down near you, you see exactly where it hit, how far away it was, and how strong the signal is. Tap any strike for the full details: timestamp, distance, and the nearest named location. Three map views give you the full picture: • Latest — live strike pins updating as storms roll through • Hotspots — a heat map showing the most active strike zones across the country • Radar — overlay storm movement on the same map Track the places that matter to you. Add named locations — Home, Cabin, the office — by dropping a pin or searching, and every strike in your History is automatically tied back to those spots. History at a glance. Flip between 24h, 7-day, and 30-day windows to see total strikes, the closest strike distance, and the peak hour. Every individual strike is logged with its time and distance so you can review a storm long after it passes. My Lightning Tracker requires a subscription to access real-time strike data. A 3-day free trial is available. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. You can manage or cancel subscriptions in your App Store account settings at any time. Privacy Policy: https://sumoftech.com/privacy Terms of Use: https://sumoftech.com/terms
Written user reviews are not shown here. Check current App Store reviews >
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.