Keep the flame going by doing a little each day.
Your day streak counts how many days in a row you have made progress. Finishing a lesson (or fixing one that needs a refresh) on a new day adds one to your streak. Days follow your local time.
Miss a day and the streak normally starts over — but once your streak is at least 3 days, the app automatically forgives one missed day (a streak freeze). After a freeze is used, another one becomes available 7 days later.
A 7-day streak earns the 7-Day Streak badge.
Related: Badges, Reminders & emails