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.
Soundings turns the twice-daily balloon launches over the United States into
$1.99
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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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 Soundings Mobile: 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: Limited detailed weather insights compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: User interface can be cluttered with too much information.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Inconsistent performance in loading data.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of severe weather alerts and notifications.
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.
Soundings turns the twice-daily balloon launches over the United States into something you can actually read — a proper Skew-T log-P, a hodograph, and the full convective parameter set, on iPhone, iPad, and Mac. THE SKEW-T, DONE RIGHT • Classic 45° Skew-T log-P: temperature, dewpoint, and the parcel trace • CAPE and CIN shaded on the chart and labeled where they occur • Wind barbs in their own gutter; LCL, LFC, and EL marked on the profile • Optional wet-bulb and virtual-temperature traces • Pinch or scroll to zoom, drag to pan, double-tap to reset PARCELS SIDE BY SIDE Surface-based, mixed-layer, and most-unstable parcels in one table — CAPE, CIN, LCL, LFC, EL, and lifted index — so you can see which one the atmosphere is really offering. Draw any of them on the chart, or none. WIND, SHEAR, AND STORM MODE The hodograph plots the wind profile with Bunkers left- and right-moving storm motion and shaded storm-relative helicity. Alongside it: the effective inflow layer, 0–1 km / 0–3 km / effective SRH, effective bulk shear, and the composites you actually reach for — SCP, STP, SHIP, derecho, EHI, and large hail. Every value is drawn against its operational thresholds, so a number means something at a glance. The math matches SHARPlib. THE WHOLE NETWORK, ON A MAP Browse every reporting site from Alaska to Puerto Rico on a map, or search by name. The map shows which stations made the current cycle, so you know what's up there before you tap. Star a station and it loads at launch. WATCH IT EVOLVE A station's recent launches appear as postage-stamp Skew-Ts — step back through the cycles to watch a cap build, a dryline mix out, or moisture return. FAMOUS SOUNDINGS Eleven of the atmosphere's most-studied days, one tap away: the 1974 Super Outbreak, Bridge Creek–Moore, April 27 2011, Joplin, Moore 2013, El Reno, Hurricane Ian's landfall and inland deluge, the Buffalo lake-effect storm, and more. YOUR OWN DATA Open Wyoming text, WMO TEMP (FM 35), or BUFR (FM 94) files straight from Fil or Finder — a research sounding, an archived launch, a case study — and get same chart and the same numbers. MADE FOR EVERY SCREEN One app for iPhone, iPad, and Mac, with Imperial or SI units and adjustable text size.
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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.