App Overview

NOAA Tide Chart Pro icon

NOAA Tide Chart Pro

NextStack LLC · Weather

welcome to noaa tides live observation, an easy-to-use app that gives you access to comprehensive tide station information

$29.99 · In-app purchases

PRICE
$29.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
3.6
5 ratings · Top 50%

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 included15 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 NOAA Tide Chart Pro: 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

Implement a more robust location search and saving feature.

Assumption to check: Limited location support and difficulty in saving multiple locations.

Validate with people who use this workflow before building.

Hypothesis 2

Ensure real-time updates and notifications for tide changes.

Assumption to check: Inconsistent updates on tide data.

Validate with people who use this workflow before building.

Hypothesis 3

Offer a more competitive pricing model with expanded features.

Assumption to check: High price with limited features compared to competitors.

Validate with people who use this workflow before building.

Hypothesis 4

Simplify the UI for better user navigation and experience.

Assumption to check: User interface can be cluttered.

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

welcome to noaa tides live observation, an easy-to-use app that gives you access to comprehensive tide station information. we have made use of the national oceanic and atmospheric administration's ( noaa) api’s to bring you accurate and reliable tide data. with our app, you can easily keep track of tides and plan your activities accordingly. whether you're a beachgoer, fisher, boater, or just interested in tides, our app has something for everyone. our app offers professional tide predictions for high and low tides across the globe, as well as day-to-day forecasts for in-depth tidal data on a specific date. you can also access real-time solar data for sunrise and sunset times, as well as monthly reports for long-term planning. here is a summary of the features we offer: • detailed tidal predictions for high and low tides around the world • daily forecasts for detailed tidal data on a specific date • real-time solunar data for sunrise and sunset times • monthly reports for long-term planning • tide history data: quickly and easily access to past tide information • the ability to search for tides by name or station id • customizable and easy-to-use widgets for tailored tide information. • the option to add tides as favorites and quickly view their high/low information • the ability to track tides and filter them by three categories: all, nearest, and favorites • customizable measurement settings to suit your preferences terms of use https://tide.nextstack.org/public/terms-of-usage.pdf

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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 Native
Expo
Zustand
Axios
React Navigation
BUILD KIT DIFFICULTY
Intermediate

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.