App Overview

Costa: Playas de Puerto Rico icon

Costa: Playas de Puerto Rico

Lamonte LLC · Weather

How's the beach today?

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
5.0
23 ratings · Top 5%

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 included16 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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Quick prompt

> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for Costa: Playas de Puerto Rico: 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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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

Integrate more precise geolocation services.

Assumption to check: Limited location accuracy for weather data

Validate with people who use this workflow before building.

Hypothesis 2

Provide clearer information about benefits of in-app purchases.

Assumption to check: In-app purchase confusion among users

Validate with people who use this workflow before building.

Hypothesis 3

Allow users to set custom alert preferences.

Assumption to check: Lack of customization for alerts

Validate with people who use this workflow before building.

Hypothesis 4

Optimize map rendering and data fetching for improved performance.

Assumption to check: Performance issues with radar loading

Validate with people who use this workflow before building.

App evidence

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

App Store description

How's the beach today? Costa gives you an answer, not a spreadsheet. One number from 1 to 100 — the Costa Score — sums up conditions at 110 beaches across Puerto Rico, in 36 municipalities and all six coasts. Underneath it sits everything that built it: currents, surf, wind, water quality, clarity, sargassum, Saharan dust, UV, water temperature, tide and weather. HOW IT WORKS Costa doesn't generate its own data. It reads 17 official sources — the National Weather Service, NOAA, CARICOOS, Puerto Rico's Environmental Quality Board, the San Juan Bay Estuary Program, USF and NOAA CoastWatch satellites, Copernicus CAMS — and turns them into something you can read at a glance. Readings are recalculated every 15 minutes. WHAT YOU GET • A clear verdict on whether it's OK to get in, and why • Rip current advisories, bacteria levels and sargassum, stated plainly • 17 public balnearios and 24 kid-friendly beaches, marked • Filters: best right now, favorites, no sargassum, balnearios, surf • Map, photos and directions • English and Spanish HONEST BY DEFAULT When we don't know something, we say so. If no water sample is taken near a beach, Costa won't show a reassuring green — it says there's no reading. A forecast is never dressed up as an observation. Every reading shows its source and when it was taken. Costa is free, has no ads, and never asks you to create an account. Made in Puerto Rico. Costa is a guidance tool, not a lifeguard service. The ocean changes by the minute. Always follow the flags, the lifeguards, and your own judgment.

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Screenshots

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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.

SUGGESTED BUILD STACK
React Navigation
Axios
React Native Maps
Redux
Expo
React Native Animated
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.