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Best Wet Bulb Apps

116+ iOS apps curated and reviewed

4.1 avg rating
17 free apps
Updated September 2026

Finding the right wet bulb apps can be overwhelming with so many options. We've analyzed 116+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Wet Bulb Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Heat SafetyHeat SafetyFree4.6★ (2.5K)YesYesSep 2026
2Wet Bulb & Safety: HeatCueWet Bulb & Safety: HeatCueFree4.9★ (11)NoYesSep 2026
3Zelus WBGTZelus WBGTFree3.1★ (42)NoYesAug 2026
4WeatherBug: Weather ForecastWeatherBug: Weather ForecastFree4.8★ (2.2M)YesYesSep 2026
5WetBulbCastWetBulbCastFree5.0★ (1)NoNoSep 2026
6HeatAlert: Heat Stress IndexHeatAlert: Heat Stress IndexFree3.6★ (11)NoNoSep 2026
7WBGT CalculatorWBGT CalculatorFree—NoNoAug 2026
8HeatSafe WBGTHeatSafe WBGTFree—YesYesAug 2026

Top Picks for Wet Bulb

Heat Safety#1

Heat Safety by Qvyshift LLC

Heat Conditions and Forecasts
Editor's Choice
☀️ Weather
4.6😞(2.5K ratings)
FreeAdsIn-App Purchases
#87in Weather
Heat Safety screenshot 1
Heat Safety screenshot 2
Heat Safety screenshot 3
Heat Safety screenshot 4
Heat Safety screenshot 5
Heat Safety screenshot 6

This tool helps prevent heat-related illnesses for outdoor workers by providing heat index and wet bulb temperature data. It offers current conditions and forecasts for US locations, using standardized risk level categorizations to help plan work activities and ensure safety.

What We Love

  • 👍 Straightforward, simple graphics
  • 🚀 Works great initially
  • 💡 Useful for understanding heat index/wet bulb temps

Room to Improve

  • 🐛 Suddenly stops working/retrieving info
  • 🐛 Inconsistent performance, won't give readings sometimes
  • 🐛 Crashes frequently when trying to get heat assessment
Wet Bulb & Safety: HeatCue#2

Wet Bulb & Safety: HeatCue by Joao Filipe Serôdio Josézinho

Heat index, WBGT & alerts
Strong Contender
☀️ Weather
4.9(11 ratings)
FreeIn-App Purchases
Wet Bulb & Safety: HeatCue screenshot 1
Wet Bulb & Safety: HeatCue screenshot 2
Wet Bulb & Safety: HeatCue screenshot 3
Wet Bulb & Safety: HeatCue screenshot 4
Wet Bulb & Safety: HeatCue screenshot 5
Wet Bulb & Safety: HeatCue screenshot 6

This app provides a clear risk assessment for outdoor activities by calculating the wet-bulb globe temperature (WBGT), which combines heat and humidity. It offers a simple risk band, UV index, and customizable alerts to help users stay safe in various conditions.

Zelus WBGT#3

Zelus WBGT by Zelusports LLC

Worth Considering
☀️ Weather
3.1(42 ratings)
FreeIn-App Purchases
#78in Weather
Zelus WBGT screenshot 1
Zelus WBGT screenshot 2
Zelus WBGT screenshot 3
Zelus WBGT screenshot 4
Zelus WBGT screenshot 5

This advanced system monitors outdoor environmental risks in real-time, including heat, lightning, and air quality. It provides essential tools for organizations to safeguard teams and ensure operational safety without needing extra hardware. Trusted globally by professionals for compliance and peace of mind.

More Wet Bulb apps to explore

FAQ about Wet Bulb

What are the best wet bulb apps for iPhone?
Heat Safety tops our wet bulb apps ranking as of September 2026, with a 4.6-star average from 2.5K App Store ratings, and it's free to download.
Yes — 17 of the top wet bulb apps we rank are free to download, including Heat Safety and Wet Bulb & Safety: HeatCue.
Heat Safety shows ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 116+ wet bulb apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
The Heat Safety app helps prevent heat-related illnesses for individuals working outdoors. It provides crucial data like heat index and wet bulb temperature, along with current conditions and forecasts for locations across the USA. This information aids in planning outdoor work activities and assessing risk levels.
Key features include current temperature, humidity, heat index, and wet bulb temperature readings. It also offers forecasts for heat index and wet bulb temperature, and categorizes risk levels based on standardized scales like OSHA-NIOSH and US Army standards. The app displays psychrometric wet bulb globe temperature to help manage hydration and rest breaks.