# Zelus WBGT > Real-time environmental risk monitoring for outdoor safety and compliance. (iPhone/iPad app by Zelusports LLC.) - Source: https://appshunter.io/ios/app/zelus-wbgt/id1605250081 (this page in markdown: same URL + `.md`) - Developer: [Zelusports LLC](https://appshunter.io/developer/1598600165) - Category: Weather, Utilities - Price: Free with in-app purchases - Rating: 3.10/5 from 42 App Store ratings · 32 written reviews indexed - Age rating: 4+ - Requires: iOS 15.6 · 87 MB - Languages: American English - Released: 2022-04-27 - Data updated: 2026-09-07 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/zelus-wbgt/id1605250081/reviews.md ## What is Zelus WBGT? Zelus WBGT: Real-Time Heat Safety Monitoring Zelus is a patented system that delivers hyperlocal Wet Bulb Globe Temperature (WBGT) readings, lightning alerts, AQI data, and compliance documentation tools — without expensive weather hardware. WBGT is not the same as temperature or heat index. It accounts for the major environmental factors that affect heat stress, including temperature, humidity, wind, and solar radiation. WBGT is widely used in athletics, military, workplace safety, and heat illness prevention programs because it provides a more complete picture of heat stress risk. With Zelus, you can monitor the conditions that matter, save important safety data, and document your decisions in the field. What Zelus Monitors • Real-Time WBGT Hyperlocal readings tied to your GPS location or saved locations • Compliance Documentation Save safety data with date, time, location, and signature stamps to support accountability, compliance, and internal review • Saved Locations Track fields, campuses, job sites, facilities, and event locations • Lightning Detection Timely alerts for your area, available with All-Star in the United States only • Air Quality Index (AQI) Real-time AQI data, available with All-Star where supported Who Uses Zelus Zelus is used by: • Athletic departments • Youth sports organizations • Construction crews • Utility teams • Military organizations • Safety officers • Outdoor teams that need practical heat and weather safety information Plans Zelus is available through a 7-day free trial followed by a paid subscription. The free version of Zelus is being discontinued on June 1, 2026. Existing free users can start a 7-day trial in the updated app. • Club Core WBGT monitoring and saved locations for individual users • Pro Everything in Club, plus alerts, compliance documentation, and WBGT forecasts • All-Star Everything in Pro, plus lightning detection and AQI monitoring Subscriptions Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription in your Apple ID Account Settings at any time. Free trials convert to a paid subscription at the end of the trial period unless canceled beforehand. A Few Things to Know • Heat illness can occur at any temperature. Always have a plan in place to prevent, recognize, and respond to heat illness. • Zelus may use your phone's last known GPS location. For the most accurate results, use saved locations. • All environmental measurement systems can occasionally produce readings outside an expected range. Users should always apply their own judgment and follow applicable policies, procedures, and local conditions. • Zelus WBGT may provide less accurate readings in certain environments, including enclosed tennis courts or large black surfaces such as parking lots. • Lightning detection is not 100 percent. If you see lightning or hear thunder, take appropriate safety precautions immediately. • Lightning detection is available in the United States. AQI monitoring is available where supported. • Signup requires a name and email address. Terms: https://zelusports.com/terms/ Privacy Policy: https://zelusports.com/privacy/ ## Key features - Real-time WBGT monitoring - Lightning detection alerts - AQI monitoring - Risk management tools - Automated data logging ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Pro | $19.99 | per month | | Club | $4.49 | per month | | Club | $49.99 | per year | | Monthly AllStar | $29.99 | per month | | Pro | $199.00 | per year | | Yearly AllStar | $299.00 | per year | ## Chart rankings - #180 in Top Free · Weather (US App Store) - #78 in Top Grossing · Weather (US App Store) ## Recent user reviews (10 of 32) All indexed reviews: https://appshunter.io/ios/app/zelus-wbgt/id1605250081/reviews.md ### 1/5 — Terrible *2026-08-21, version 1.5.1.6* There’s not even an option for free but it states that. Not worth the fees delete! ### 2/5 — Worked when it was free *2026-08-17, version 1.5.1.6* I’m not paying for this. A subscription is unnecessary. It was good while it was free. ### 1/5 — No free option anymore *2026-08-11, version 1.5.1.6* I’ve used this for years as required by my school for coaching. Now it requires payment. Finding a different option because coaches don’t get paid enough to add a subscription model for weather updates. ### 1/5 — Not sure it’s accurate *2026-08-05, version 1.5.1.6* Not sure I can trust this app and where it’s getting its info from - might as well use Apple Weather ### 2/5 — Used to be great *2026-07-20, version 1.5.1.5* Was great until the free app was no longer free to use. ### 1/5 — Constant Logouts *2026-07-13, version 1.5.1.5* The site will prompt you to purchase the monthly or annual subscription and if you don’t, it forces you to logout and doesn’t ever allow you to save your login information for some reason. ### 1/5 — No more free tier *2026-07-08, version 1.5.1.5* Almost all of these 5 star reviews are of the version of the app that was free. Now you have to pay for it. ### 3/5 — Subscription needed *2026-07-03, version 1.5.1.5* Really enjoyed this app when it was free. Moving to another one now that there’s a monthly charge to continue using. ### 1/5 — Not free *2026-06-29, version 1.5.1.4* This was great but now it is not free! It says that you can choose from free in the plans, but there is no free option! Anything to make a dollar I mean for that price I’ll just buy a wet bulb monitor! ### 1/5 — No Free Option *2026-06-29, version 1.5.1.4* It was good enough on the free option, but if I’m paying, there needs to be more offered. ## Frequently asked questions about Zelus WBGT ### What does Zelus WBGT do? Zelus WBGT is an advanced weather safety system that monitors outdoor environmental risks in real-time. It provides data on WBGT (Wet Bulb Globe Temperature) for heat safety, lightning detection, and AQI (Air Quality Index) monitoring. It also includes risk management tools to help organizations safeguard their teams and ensure operational safety. ### What are the key features of Zelus WBGT? Key features include real-time, hyperlocal WBGT data for heat safety and compliance, timely lightning detection alerts, AQI monitoring for air quality, and risk management tools that automatically save critical safety data with date, time, and signature stamps for accountability. ### Is Zelus WBGT free to use? The application is free to download and use, offering core environmental monitoring features. However, certain advanced functionalities or premium services may be available through in-app purchases, as indicated by the presence of in-app purchases. ### What are the limitations or warnings for Zelus WBGT? Zelus WBGT may give inaccurate readings in enclosed spaces like tennis courts or on large black surfaces. It uses the phone's last known GPS location, which might not be the current location, so saved locations are recommended for accuracy. Lightning detection is primarily available in the United States, and AQI monitoring is available where supported. Always use your best judgment regarding activity levels. ### Who is Zelus WBGT designed for? This app is designed for professionals and organizations that operate outdoors or manage outdoor activities, including Fortune 500 companies, elite sports teams, and military units. It's for anyone needing to monitor environmental conditions to ensure safety, compliance, and mitigate weather-related risks. ## Version history (last 5 releases) ### 1.5.1.6 — 2026-07-28 - Fixed minor bug ### 1.5.1.5 — 2026-07-02 - Fixed minor bug ### 1.5.1.4 — 2026-06-11 - Fixed minor bug ### 1.5.1.3 — 2026-05-12 Bug fixes and performance improvements. Updated subscription options. ### 1.5.1.2 — 2026-02-25 - Fixed minor bug ## Apps similar to Zelus WBGT | App | Rating | Price | Category | | --- | --- | --- | --- | | [Wind Compass](https://appshunter.io/ios/app/wind-compass/id662297095) | 4.6 (22,978) | Free | Weather | | [Weather Puppy Forecast + Radar](https://appshunter.io/ios/app/weather-puppy-forecast-plus-radar/id528732981) | 4.8 (53,769) | Free | Weather | | [Tides Near Me](https://appshunter.io/ios/app/tides-near-me/id585223877) | 4.8 (159,969) | Free | Weather | | [Real Thermometer](https://appshunter.io/ios/app/real-thermometer/id1272049393) | 4.5 (70,062) | Free | Weather | | [CARROT Weather: Alerts & Radar](https://appshunter.io/ios/app/carrot-weather-alerts-and-radar/id961390574) | 4.7 (86,721) | Free | Weather | | [Moon Phases and Lunar Calendar](https://appshunter.io/ios/app/moon-phases-and-lunar-calendar/id1126370589) | 4.9 (36,874) | Free | Weather | ## More apps by Zelusports LLC - [Zelus Enterprise](https://appshunter.io/ios/app/zelus-enterprise/id6743960693) All apps by Zelusports LLC: https://appshunter.io/developer/1598600165 ## Related topics [zelus wbgt](https://appshunter.io/ios/topics/zelus-wbgt) · [zealous](https://appshunter.io/ios/topics/zealous) · [wet bulb temperature](https://appshunter.io/ios/topics/wet-bulb-temperature) · [wet bulb](https://appshunter.io/ios/topics/wet-bulb) · [wbgt](https://appshunter.io/ios/topics/wbgt) · [heatstroke wbgt](https://appshunter.io/ios/topics/heatstroke-wbgt) · [heatsafe wbgt](https://appshunter.io/ios/topics/heatsafe-wbgt) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-07.*