Zelus WBGT for iPhone

Quick summary

Zelus WBGT is a mobile app that delivers rapid Wet Bulb Globe Temperature (WBGT) readings and now includes lightning-strike warning notifications. It combines hyperlocal weather inputs — like solar radiation and relative humidity — to produce more detailed heat-safety guidance than simple temperature measures. The app is designed to help reduce heat-related illness risk during outdoor activities.

Organizations that rely on it

• US Army Special Forces
• Local police departments
• Universities
• K–12 schools

Core (free) capabilities

• Provides immediate WBGT measurements without waiting for sensor equilibration, so you get fast results.
• Shows current hyperlocal weather at your location (humidity, solar radiation, etc.).
• Delivers WBGT values based on your GPS coordinates on demand.
• Integrates fine-scale environmental inputs to refine WBGT accuracy beyond basic air temperature.

Upgrades and paid options

• Receive real-time lightning strike alerts and associated notifications.
• Save measured WBGT values with timestamps for later review and recordkeeping.
• Set configurable alerts for specific temperature or WBGT thresholds.
• Request WBGT readings for locations around the world (global coverage).

Suggested alternative

If you want another free choice, consider Agrar Wetter Free for basic hyperlocal weather data and simple heat-safety information.

Why use Zelus WBGT

Zelus is useful for coaches, safety officers, outdoor workers, and military personnel who need precise, location-specific WBGT estimates and the added protection of lightning warnings to manage outdoor exposure safely.