App Overview

H20Score - Water Rankings icon

H20Score - Water Rankings

Pato Apps LLC · Food & Drink

H20Score: What’s Really in Your Water

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.6
1,259 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 included17 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 H20Score - Water Rankings: map the core Food & Drink 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

Include user-generated content to expand database

Assumption to check: Limited water brand selection

Validate with people who use this workflow before building.

Hypothesis 2

Implement advanced search filters and sorting options

Assumption to check: Difficulty in finding specific brands

Validate with people who use this workflow before building.

Hypothesis 3

Add social sharing and friends’ rankings

Assumption to check: Lack of social features

Validate with people who use this workflow before building.

Hypothesis 4

Clarify subscription benefits with clear onboarding

Assumption to check: In-app purchase confusion

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

H20Score: What’s Really in Your Water Have you ever wondered what’s actually in the bottled water you drink or the tap water in your home? H20Score helps you cut through the confusion and get the facts. Whether you’re buying a water bottle or filling a glass at the sink, H20Score gives you clear, trustworthy insights into water quality—so you can make smarter choices for your health. Scan. Learn. Compare. Just take a photo or scan the barcode on any water bottle, and H20Score will instantly show you a detailed breakdown based on the brand’s water report. You’ll see important data like TDS, fluoride, pH, and more—translated into a clear rating that’s easy to understand. Nationwide Tap Water Data H20Score includes water quality information for every major city in the United States. Search by city or zip code to view local tap water reports, learn about potential contaminants, and see how your water compares to others. Choose Better Filters and Bottles Looking for the best water filter? Curious which bottled water brands are truly clean? H20Score helps you compare options based on real data—not marketing claims. H20Score makes it simple: • Scan or search to find detailed water reports • Instantly see what’s in your tap or bottled water • Get personalized scores and product comparisons • Make informed choices about filters, bottles, and brands Water is essential—make sure yours is clean. Subscription Details: Start with a 3-day free trial. The subscription renews at $29.99 per year or $19.99 per year after the trial period. Payment will be charged to your iTunes account, and your subscription will auto-renew annually. By subscribing, you agree to our terms and the auto-renewal policy. Terms: https://www.emailmeform.com/builder/form/ffO3tYG6Bb9Nfy5zD3p Privacy: https://www.emailmeform.com/builder/form/IdE0iBN52Q3XGyfWrp

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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
Supabase
Zustand
React Navigation
React Native Gesture Handler
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.