How do challenges work?
One to five habits a day for a set number of days, alone or with a friend.
Updated September 25, 2026
A challenge is a set of 1 to 5 habits you commit to every day for a set number of days. Start from a trend like Winter Arc or Project 50, or build your own.
- Open the Friends tab and, under Challenges, tap New challenge.
- Choose a challenge, or Build your own and pick 1 to 5 habits.
- Choose Solo, or With a friend and pick who.
- Pick a mode and tap Start tomorrow.
Strict or Easy
- Strict: the day counts only when every habit is done.
- Easy: the day counts when at least one habit is done.
Winter Arc runs from October 1 to December 31, so it opens in October.