Back to Wet Bulb Globe Temperature

Effective September 12, 2026

Open Source Notices

Open source and third-party notices for Wet Bulb Globe Temperature.

Open Source Software

Wet Bulb Globe Temperature uses open source software for purchases, authentication, app attestation, analytics, diagnostics, remote configuration, advertising, consent, networking, and data transport.

RevenueCat Purchases SDK

Copyright (c) 2024 RevenueCat, Inc.

Permission is granted, free of charge, to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the software, subject to including the copyright and permission notice. The software is provided without warranty.

Firebase Apple SDK

  • iOS package: firebase-ios-sdk 12.17.0
  • Products: Firebase Core, Analytics, Crashlytics, Remote Config, Authentication, and App Check
  • Source: github.com/firebase/firebase-ios-sdk
  • License: Apache License 2.0

The Apache License 2.0 text is available from apache.org/licenses/LICENSE-2.0.

Google Mobile Ads And User Messaging Platform

  • iOS Google Mobile Ads package: swift-package-manager-google-mobile-ads 13.7.0
  • User Messaging Platform package: swift-package-manager-google-user-messaging-platform 3.1.0
  • Sources: Google Mobile Ads and Google User Messaging Platform
  • License and terms: applicable Google SDK and package terms

Transitive Support Packages

The iOS release also includes support packages used by Firebase, Google Mobile Ads, User Messaging Platform, measurement, transport, authentication, or app attestation: abseil-cpp-binary 1.2024072200.0, app-check 11.3.1, google-ads-on-device-conversion-ios-sdk 3.6.1, GoogleAppMeasurement 12.17.0, GoogleDataTransport 10.1.1, GoogleUtilities 8.1.2, grpc-binary 1.69.1, GTMSessionFetcher 5.3.1, interop-ios-for-google-sdks 101.0.0, leveldb 1.22.5, nanopb 2.30910.1, and Promises 2.4.1.

Weather Data And Scientific References

Weather data providers and scientific method references are services and publications rather than software bundled into the app. The app identifies the selected provider and exposes source or attribution details where required. Providers can include Apple WeatherKit, the US National Weather Service, Japan Ministry of the Environment, Singapore NEA through data.gov.sg, Visual Crossing, Bright Sky/DWD, and MET Norway.

App-modeled WBGT uses the uncalibrated NWS Dim228 and RCC Equation 8 calculation with weather inputs and solar-radiation handling based on published methods. The separate offline wet-bulb calculator uses Roland Stull's approximation. A modeled result remains labeled as an estimate; Apple and other weather-input providers do not supply the app's calculated WBGT result.

When Apple supplies any displayed weather component, the iOS app displays the Apple Weather mark and a link to Apple Weather data sources. Mixed-provider forecasts and saved source information retain this attribution.

For questions about this document, contact [email protected].