App Overview

RainViewer: Live Weather Radar icon

RainViewer: Live Weather Radar

MeteoLab Inc. · Weather

Live weather radar, nowcast and rain alerts, hyperlocal forecast and hurricane tracker, built to help you see, understand, and act on rain before it changes.

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
30,912 ratings · Top 15%

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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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.

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.

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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> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for RainViewer: Live Weather Radar: 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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App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

Screenshots

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App Store description

Live weather radar, nowcast and rain alerts, hyperlocal forecast and hurricane tracker, built to help you see, understand, and act on rain before it changes. Tracking a hurricane’s path or just checking if it’s dry enough for a walk? RainViewer shows the actual rain on the map. Data reaches your screen in seconds, direct from the radar source, not a third-party feed. 10 million downloads. RAIN FIRST We rearranged the forecast tab to put nowcast and radar at the top. The minute-by-minute rain intensity chart shows when rain starts, peaks, and stops, with a radar map preview and temperature beside it. Cleaner hourly and daily charts now show rainfall totals. The chance of rain is only half the picture: how much falls, and how fast, makes the difference. BUILT FOR IPHONE DUO RainViewer adapts radar map to every pose in Duo: open it and your locations sit beside the forecast on the inner display, with more hours and days at once; close it and the forecast follows you to the outer display; in landscape, navigation moves to the side and the rain stays in focus. THE RADAR MAP YOU ACTUALLY USE • 2-hour rain nowcast updated every 10 minutes. • Tap the map to see rain details on every layer. • Fullscreen mode clears the interface for clean screenshots and storm animations. • 48-hour radar animation. • 60fps vector map with arrows that show rain direction. • Coverage in 80+ countries across the Americas, Europe, Asia, and Oceania. HOURLY AND 14-DAY FORECAST Temperature, conditions, wind speed and direction, chance of precipitation, and rain amount hour by hour for 72 hours and day by day for 14 days. RAINFALL TOTALS (QPE) Pick a window - 1, 3, 12, 24, or 48 hours - and tap any spot on the map for the exact amount in millimeters or inches. RADAR SCAN AGE Tap the map to see when each area was last scanned, so you know when to leave. RAIN ALERTS YOU CAN RELY ON Set custom alerts for your locations. Get national severe weather alerts from the US, most of Europe, Thailand, Saudi Arabia, and more. HURRICANE AND STORM TRACKER Follow hurricanes, typhoons, and cyclones on the map. See each storm's live position, path, category, and wind speed in your units AI WEATHER INSIGHTS Get AI to write a short summary of what to expect. APPLE WATCH (FREE) Standalone app with radar map, satellite, forecast, severe alerts, and complications. Works without your iPhone. WIDGETS AND LIVE ACTIVITIES Radar and minute-by-minute rain widgets for Home Screen and Lock Screen. Live Activities show rain intensity as it changes. PRO RADAR (US + MOST OF EUROPE, 22 COUNTRIES) Doppler products on all tilts - reflectivity, velocity, spectrum width, and the differential measurements used by meteorologists. PRIVACY Location is used only for local forecast and rain alerts. We never sell your data. CHOOSE YOUR PLAN FREE: live radar, 30-minute nowcast, 6-hour and 5-day forecast. TRY ESSENTIAL OR PRO FREE FOR 14 DAYS ESSENTIAL, $19.99/year: 2-hour nowcast, Rainfall Totals, AI insights, and the 72-hour and 14-day forecast. PRO, $39.99/year: Essential plus 48h radar playback and Doppler products. Local prices differ. 14-day trial. Privacy: https://rainviewer.com/privacy.html Terms: https://rainviewer.com/terms.html

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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

Allow users to customize radar layers and refresh intervals.

Assumption to check: Limited customization of radar settings

Validate with people who use this workflow before building.

Hypothesis 2

Implement a more reliable source for weather alerts.

Assumption to check: Inaccurate weather alerts reported

Validate with people who use this workflow before building.

Hypothesis 3

Offer an ad-free experience through subscription.

Assumption to check: Ads can be intrusive

Validate with people who use this workflow before building.

Hypothesis 4

Add offline caching for frequently viewed locations.

Assumption to check: Limited offline capabilities

Validate with people who use this workflow before building.

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.

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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.