It's necessary to create an account before trying this even once. Nowhere in the App Store or at the Zelus website does it state how much it costs. Shame because it looks like it would be a really useful app. I don't know if it will cost a little or a lot -- not willing to create an account just to find out.

This app is an integral part of our athletics program. It helps keep the entire campus informed about dangerous weather conditions.

Works just fine for me and shows the Wet Bulb Global Temperature where I live in Massachusetts. If you are unaware WBGT is not how we normally measure temperature. It will look completely different than your normal forecasts and is useful for knowing how safe it is to exercise outdoors in your area. I really didn’t like how I had to make an account. The app already asks for your location so there is no need for it to save other data just to deliver local weather. The built in weather app doesn’t need an account, this one shouldn’t either

It’s impossible for this to be as good as hand held. We use this to compare it to our hand held and our weather app and it is very inaccurate

This is a great app. It’s easy to use and gives me the information that I need.

Our WBGT would wildly change 7-10 degrees in minutes. Not possible. I wouldn’t trust this app for life threatening decisions.

The thought of the app was a good idea, but for some reason, when in reality it’s 100°F, IT SAYS ITS 90°F ON THE APP, MAKING IT OKAY TO PRACTICE???? That’s crazy. Crazy? I was crazy once. They locked me in a room. A rubber room. A rubber room filled with rats. The rats made me crazy. ANYWAYS, something is wrong. Please fix it ASAP

This app is a great example of a tool that does exactly as advertised. Do you want to know the WBGT? This will give it to you. It will also allow you to see various scales for WGBT and their recommendations for outdoor activities. As opposed to other apps, it’s clear you’re getting the WBGT here and not the Wet Bulb Temperature, which are (unfortunately) two different things. And that’s enough. If you need the WBGT and know what that is, then this is the app for you. If you don’t, go google it and then come back and download this app. WBGT is quite useful, and this app usefully provides it.

I started using the app recently and it is a lot more convenient than carrying around a handheld. I checked the readings against a handheld and they are either identical or very close. So far, so good.