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.
The only ENSO app with actual forecasts.
$4.99
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.
Your first Build Kit is free with a verified email.
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.
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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.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
The only ENSO app with actual forecasts. El Niño and La Niña shape winters across the globe — where it floods, where the snow falls, where the storm track goes. El Niño Forecast puts the real data in your pocket: the same indices NOAA uses, the same models the forecast centers run, updated on their schedules and honest about every date. CURRENT CONDITIONS • The weekly Niño 3.4 index • RONI, NOAA's official index since 2026 • The official NOAA/CPC outlook • A pan-and-zoom Pacific temperature anomaly map with options to view recent trends • Seventy-five years of ENSO history, scrollable, with official episodes shaded FORECAST EVOLUTION • The full multi-model plume: seasonal models from NOAA, NASA, ECMWF, the Met Office and more, with the multi-model mean that decades of verification say to trust • Forecast trends — watch successive monthly runs step the peak up or down, with a plain-language trend verdict MY FORECAST • Pick any point on Earth and get its own outlook: a plain verdict ("Wetter than average"), the map framed on your region, and a week-by-week timeline • Six-week and six-month forecast maps for temperature, precipitation, snowfall and the jet-stream level, as anomalies or percentiles • Percentile mode tells you how unusual — including "highest on record" ALERTS • Push notifications when the official status changes, when a new ONI posts, and when a new forecast arrives — a few a month, silence otherwise LEARN • Five short chapters on how ENSO actually works, with NOAA's own figures BUILT BY A PHD ATMOSPHERIC SCIENTIST Forecast model data is complex and difficult to interpret. The multi-model forecast maps are designed to be easy to interpret and actionable. Users can quickly filter by temperature or precipitation anomalies and time period to understand the likely trends this winter in their area. Experts and motivated users have the option to view individual models and draw their own conclusions. The app works offline with the last data received. No account, no tracking, no ads — your location never leaves your phone. Data: NOAA (OISST, CPC, NMME), Copernicus C3S, ECMWF S2S, ERA5. This is an independent app, not affiliated with NOAA.
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.
Not assessed in a Build Kit yet.
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.