https://rbrn-labs.com/news/ Swelter is an iOS app for planning outdoor activity in the heat, powered by wet-bulb globe temperature (WBGT). Built by RBRN Labs, an indie studio in Virginia. en-us https://rbrn-labs.com/news/welcome-to-swelter/ https://rbrn-labs.com/news/welcome-to-swelter/ Thu, 30 Jul 2026 00:00:00 GMT Swelter is a brand-new iOS app that shows how risky it is to be active outdoors right now and helps you find the best times for outdoor activity.