WATI - The Wearable Ambient Temperature Indicator and Your Heat Navigator in the City

WATI is a smart, stylish wearable designed to help you navigate the rising urban heat. With a minimalist touchscreen interface, WATI keeps you cool, hydrated, and always informed of the temperature and weather on the go.

Walking, cycling, or commuting, WATI measures live outdoor temperatures, counts your steps, and guides you through the coolest route, all with the paired WATI mobile app. Clip it to your clothes, or wear it with a lightweight armband for outdoor sports activities.

WATI helps you move smarter in the city, while contributing to a crowdsourcing community that enhances cool-route algorithms and informs city planners. The WATI mobile app uniquely combines ground-level temperature data from users with satellite-based urban heat maps, creating a new tool for climate insights.

Starting in the summer of 2025, Digital Spaces Living Lab (DSLL) tested the first prototypes of the WATI wearable and mobile app with a small group of runners in central London. In these Living Lab trials WATI was powered by urban heatmaps from LLcloud’s partner meteoblue (https://www.meteoblue.com/en/products/cityclimate). Further tests of the next version of the prototypes are planned in London and Sofia in the summer of 2026.