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.
App Overview
Thermo-hygrometer
Check temperature, humidity, pressure, and discomfort index at a glance.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
1,896 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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Build Kit
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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/
Preview a sample Build Kit No email needed
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Thermo-hygrometer: 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
Allow users to create custom alert thresholds for temperature and humidity.
Assumption to check: Limited customization options for alerts and notifications.
Validate with people who use this workflow before building.
Hypothesis 2
Provide graphs and trends for temperature and humidity over time.
Assumption to check: Lack of detailed historical data analysis.
Validate with people who use this workflow before building.
Hypothesis 3
Integrate with APIs for additional weather data and forecasts.
Assumption to check: No integration with external weather services.
Validate with people who use this workflow before building.
Hypothesis 4
Offer a free trial or limited features for users to experience before purchasing.
Assumption to check: In-app purchase model may deter users.
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
Check temperature, humidity, pressure, and discomfort index at a glance. An analog-style weather information app that expresses your daily air conditions in a beautiful and intuitive way. Based on your current location, check outdoor temperature, feels-like temperature, humidity, pressure changes, and discomfort index (DI) through a beautifully designed gauge interface. [FEATURES] • Beautiful analog gauge design • Current temperature and feels-like temperature (Celsius / Fahrenheit) • Humidity meter for monitoring comfort levels • Mini trend graph for short-term changes • Barometer support (hPa / inHg / mmHg) • Sea-level pressure and station pressure display • 24-hour pressure trend (rising · falling · stable) • Discomfort Index (DI) calculation • Widgets support • Apple Watch app and various complications [DID YOU KNOW?] • The Discomfort Index (DI), developed by Thom in 1959, is an indicator that quantifies how hot and uncomfortable people feel based on temperature and humidity. • Pressure values are converted and provided as sea-level pressure based on World Meteorological Organization (WMO) standards. Supported devices can also measure station pressure using the built-in sensor. • On GPS-enabled iPhone and iPad devices, more accurate information can be provided using the latest observation data around your current location. • Add cities manually to use the app without GPS. [PLEASE NOTE] • This app does not measure room temperature using an indoor sensor. • It provides outdoor temperature, humidity, and pressure information based on your current location. [CONTACT & SUPPORT] If you have any issues or suggestions, please contact us anytime: [email protected]
Written user reviews are not shown here. Check current App Store reviews >
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
Redux
axios
react-native-gesture-handler
@react-navigation/native
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.
