Bad weather is going to happen, whether you’re dressed for it or not. From unexpected heat waves and cold snaps to sudden rainfall, having the foresight to look at a weather app is often the difference between a good day and a bad one.

Of course, not all weather apps are equal. Some are better designed than others, and a handful cost a few dollars to download, or have in-app purchases for certain features. And the one that came with your phone is often too basic to be super helpful. So what should you look for when picking the best weather app?

Pretty much every weather app will present you with the most relevant data, like temperature, wind speeds and expected precipitation. But some are simply presenting forecasts from government sources, like the National Oceanic and Atmospheric Administration (NOAA), while others are doing their own weather predictions — so it’s wise to check a variety of apps and compare their forecasts against one another.