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.
Neptune has been built from the ground up to provide the most accurate and local weather forecast possible
Free
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.
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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.
Neptune has been built from the ground up to provide the most accurate and local weather forecast possible. It maintains simplicity without sacrificing the details that make a weather application useful. Neptune ingests a wide variety of raw weather models from around the world and monitors their forecasts against what actually happens. Neptune's forecast engine creates a precise prediction tailored to your location, and it’s designed to learn and get better over time. After a few days of forecasting and observing, Neptune will publish its accuracy against the National Weather Service to prove it's worth. VOLUMETRIC RADAR Neptune ingests raw volumetric radar data from the leading, most up-to-date sources and displays it against true to life terrain. Watch a timelapse of storms growing from the ground up and use Neptune's radar tools to cut apart layers of the storms at different elevations. Neptune offers both high resolution raw radar data, and pre-filtered radar data. Neptune also offer's HRRR and GFS data all built into the maps functionality for extended visual forecasts and analysis. MAPS AND OVERLAYS In addition to radar, Neptune offers temperature, precipitation, dynamic wind, lightning, and cloud overlays. The underlying map was custom built from the ground up to show detailed terrain features and elevation changes. This allows storms to be displayed at real scale against perfectly recreated mountains and ravines. FORECAST CONFIDENCE Instead of showing you an arbitrary probability, Neptune publishes a confidence band for its forecast fields to display the agreement between the models it ingests. This allows you to visualize model convergence and divergence and get a feel for the true range of possibilities being predicted. Neptune automatically tunes its final prediction; however, it also aims to be transparent enough to show its work. BUILT-IN QUERY TERMINAL If interacting with a UI isn’t your style, or you prefer to have data in a custom format, Neptune provides a query terminal with its own built in query language to access its weather data. The syntax is easy to learn and suggestions are provided for you; however, you can also query in plain text using Apple’s on device LLM to translate it into a weather query and interpret the output. Query historical data as far back as the data goes for your location or put together custom forecasts based on only the fields that you want. You can create preset commands to quickly run a query that you find useful. HAIL AND ROTATION ALERTS Neptune uses leading data sources to warn you of any nearby hail or rotational activity. It monitors the live, high resolution radar in your area to be as accurate as possible and increase its chances of providing plenty of reaction time. AND A TON MORE -Astronomy and solar storm data -U.S. Army Core of Engineer reservoir data -Tide, wave, and ocean climate data -Seasonal forecasts -Detailed historical analysis -Fully customizable ONGOING SUPPORT AND INNOVATION Neptune is a brand new weather application and this is just the beginning. Our team is dedicated to providing ongoing, meaningful updates to Neptune for the foreseeable future. Stay tuned for what’s to come! OUR COMMITMENT TO TRUE PRIVACY AND CUSTOMER SATISFACTION Unlike other weather applications, Neptune will never sell or distribute ANY of your data. For more details, see our privacy policy below. Neptune requires a subscription after a one-month free trial. Neptune Monthly: $12.99/month Neptune Yearly: $79.99/year Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless turned off at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings after purchase. Any unused portion of a free trial is forfeited when a subscription is purchased. Privacy Policy: https://neptuneweather.io/privacy.html Terms of Use: https://neptuneweather.io/terms.html
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.