About this app
Heat Index: Wet Bulb helps you avoid heat-related illness by showing clear heat conditions and forecasts — with no ads. Designed exclusively for users in the United States. The app uses a U.S.-only data service, so data is not available outside the United States. Key features Current Heat Index and risk level guidance (OSHA/NIOSH-style scale) Current Wet Bulb / WBGT categories (when available) Home Screen widget for at-a-glance Heat Index and WBGT Hourly forecasts with 48-hour trend charts 7-day outlook for planning work and training Fast U.S. location search + optional current location Clean, readable design with modern charts Who it’s for Outdoor workers, coaches, athletes, hikers, safety teams, and anyone planning time outside. Privacy-Friendly No account required. Location is optional and only used when you choose “Use Current Location”. Buy once and use all features forever. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy and Terms Access our Privacy Policy and Terms and Conditions directly through the app or online. https://emkapps.com/heatindex-privacy-policy/ https://emkapps.com/heatindex-termsconditions/ Data Source Weather data provided by the U.S. National Weather Service
Latest release
What’s New
Performance improvements and minor optimizations.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 12, 2026 · 3:52 AM $2.99
Screenshots
