App Overview

My PurpleAir icon

My PurpleAir

Paul Demers · Weather

Monitor the AQI from your own PurpleAir sensor from your iPhone, iPad, or watch

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
3.9
11 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 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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> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for My PurpleAir: 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

Expand database to include more sensors and locations.

Assumption to check: Limited sensor locations available

Validate with people who use this workflow before building.

Hypothesis 2

Provide comprehensive historical AQI data and trends.

Assumption to check: No detailed historical data

Validate with people who use this workflow before building.

Hypothesis 3

Implement a cleaner, more organized UI layout.

Assumption to check: User interface is cluttered

Validate with people who use this workflow before building.

Hypothesis 4

Enhance notification system for better reliability.

Assumption to check: Notifications can be unreliable

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

Monitor the AQI from your own PurpleAir sensor from your iPhone, iPad, or watch. Use the app's simple screen, or, add a widget / complication to your Home Screen / watch face.. This app can only monitor a sensor on the same LAN as the watch or companion phone. To setup: 1. Connect the app to the device. Use the device search, or enter your sensor’s IP address 2. Add a app’s complication or widget to your home page to watch faces. Data sharing between an iPhone/iPad and a companion watch: 1. The sensor address is shared both ways, 2. If one device has an address, but the other doesn't, then opening the app that doesn't have an address copies the address from the paired device. a. If the address doesn't copy within a minute, close the app on both devices and restart them. 3. Changing address on the phone changes the address on the watch. a. Changing the address on the watch does not change the phone, UNLESS the phone doesn't have an address. 4. The latest sample is sent from the phone to the watch, if the watch is in range, regardless of addresses. Air quality details: The app shows the PM2.5, "120 second average refreshed every 10 seconds" on the sensor's built in web page. It averages the A and B channels. Specifically, the pm2.5_aqi and pm2.5_aqi_b fields from the json API. You can see same numbers by pointing a browser at http://device_address/json The app updates the AQI approximately every 15-20 minutes, or when you open the app or restart your watch. It can take a long time to update widgets/complications when reconnecting to a network. On iPhone/iPads with iOS version 16.4 or higher installed, the app is refreshable, that is, pulling down on the screen forces everything to refresh. NOTICE: This app is not a product of PurpleAir, Inc.

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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
Victory Native
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.