HeatOK: Heat Index & WBGT

Wet Bulb Temperature & Safety

Free · In‑App Purchases

Now on Apple Watch, with Siri and Shortcuts. Plan outdoor time with Heat Index, Wet-Bulb Temperature, Estimated WBGT and a clear lower-risk window. HeatOK helps you understand hot, humid weather before you head outside. See the current Heat Index, Wet-Bulb Temperature (WBT), and Estimated Wet-Bulb Globe Temperature (WBGT), then plan around the lower-risk hours in your day. With HeatOK, you can: • Use Heat Index, Estimated WBGT, or air temperature as your primary scale. • See Wet-Bulb Temperature, globe temperature, humidity, dew point, wind, and UV Index together. • Follow the hourly heat path and check the day ahead. • Choose an outdoor context for relevant precautions, including exercise, outdoor work, caregiving, and dog walks. • Check heat risk, Heat Index, WBGT, and the hourly forecast on Apple Watch (companion to the iPhone app). • Ask Siri or run a Shortcut for the current heat risk, temperature, WBGT, or the best outdoor window. • Save places, use Home Screen widgets, and set personal threshold alerts. Some features require HeatOK Pro. Every reading identifies its scale, source, and data freshness. Estimated WBGT is calculated from forecast weather data and does not replace an on-site globe thermometer. HeatOK provides weather information and general precautions. It is not medical advice or an emergency service. Terms of Use: https://docs.google.com/document/d/1DQU5swaVHWejOGgZuZI94XEPqKfQTXp_Ej9gwHvx3nE/edit?usp=sharing Privacy Policy: https://docs.google.com/document/d/1GVG0Mki7H7LBtjM6e5Veh-u3eUsobu4KY5h92uBhdVc/edit?usp=sharing

Ratings & Reviews

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Apple Watch app: view current heat risk, Heat Index, WBGT, and hourly forecast right on your wrist. Siri & Shortcuts support: check heat risk, temperature, WBGT, or the best outdoor window with Siri or Shortcuts. Enhanced metric detail views, performance improvements, and bug fixes.

Version 1.1.0

The developer, Vadym Slobodianiuk, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Vadym Slobodianiuk
Size
  • 24 MB
Category
  • Weather
Compatibility
Requires iOS 18.0 or later.
  • iPhone
    Requires iOS 18.0 or later.
  • iPad
    Requires iPadOS 18.0 or later.
  • Apple Vision
    Requires visionOS 2.0 or later.
  • Apple Watch
    Requires watchOS 26.0 or later.
Languages
English and 9 more
  • English, Arabic, French, German, Italian, Japanese, Portuguese, Spanish, Traditional Chinese, Ukrainian
Age Rating
13+
  • 13+
  • Learn More
  • Infrequent
    Medical Treatment information

    Contains
    Health or Wellness Topics
In-App Purchases
Yes
Copyright
  • © 2026 Vadym Slobodianiuk
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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