What is the longest duolingo streak?

The longest Duolingo streak is currently held by John Arnold from the United States. As of August 2021, his streak stood at 4,784 days, which means he has been using Duolingo daily for over 13 years. Arnold began his streak on January 2011 when Duolingo was first launched, and has since studied Spanish, French, Italian, German, Portuguese, and Esperanto on the platform. He is celebrated by the Duolingo community as an inspiration for consistent learning and dedication to language learning.