curve of a wide range of specified trainers. Zwift was originally available only for users with personal computers. In December 2016, Zwift launched on iOS, and in November 2017, the application became available via Apple TV. Zwift also includes a mobile app which allows users to change direction, take screenshots, communicate via messaging, use power-ups and follow other athletes. As of January 2018, there were over 550,000 accounts. Investment In December 2018, Zwift raised a Series B investment of $120 million: the investment round was led by Highland Europe, an English investment company. The CEO Eric Min announced the money would be spent on categories expansion, including esports tournaments and further development of Zwift Run. Zwift ranked fifth in Fast Company's 2019 Most Innovative Companies (Sports Sector). In September 2020, Zwift raised a $450 million minority investment led by investment firm KKR. The funds will be used to push the development of Zwift's core software platform and bring Zwift-designed hardware to market. Worlds There are twelve worlds, or maps, in Zwift. Only one is always available: Watopia, a fictitious island, which has seen some of its expansions lean into fantasy, including dinosaurs and riding into an active volcano. This world also includes a recreation of the famous Alpe d'Huez climb. Eight worlds are rotated according to a predetermined schedule. They are: The last two worlds can only be accessed as part of a scheduled event: Community As of June 2021, Zwift had more than 334,000 fans on the social media platform Facebook. Facebook chief executive Mark Zuckerberg used the platform to help continue training after suffering a broken arm. An article in La Velocita called the game's fans "Zwifters". An early partnership between Zwift and ride-sharing site Strava has led to integration with Zwift rides being automatically uploaded to Strava if users enable the function. The first documented Zwift race was held March 3, 2015 organized through Facebook and modeled after weeknight race-riding, a common community event in the road racing subculture of cycling. One of the earliest groups to offer established racing on Zwift was KISS, which started races in late 2015 and had grown by 2018 to become one of the largest organizers on the platform. As of September 2022, Zwift users had used the platform to amass: Total miles ridden: 3.37 billion Total meters climbed: 53 billion Total watt hours: 26.9 billion Average elevation: 277m Average distance: