Walk outside with a story
Wren, an AI agent, builds a case from what you photograph during the walk. Follow Wren to solve the case.
PlayHow to play

1
Your street starts the case
Take a photo of where you are, even indoors. Wren turns it into the start of a case, then leads you outside.

2
Follow the quests
Each quest asks for a photo of something a few minutes' walk away, or a closer look. A photo that moves the case forward becomes a piece of evidence.

3
Solve the case
Collect evidence until it points to the answer, by the end of your walk.
Play with a friend
A case can have two players. You each get a lead, your own trail of evidence to follow on your own walk, and both trails end at the same answer.

Send a friend the link
They see the case and take the other lead, on their own walk.

Solve it together
Every piece shows who found it, and a chapter ends once you've both found your part.
Why on foot
31%
of adults don't get enough physical activity, up from 23% in 2000.
The Lancet Global Health, 202425%
lower risk of depression with the activity of 2.5 hours of brisk walking a week.
JAMA Psychiatry, 2022
More on the Impact page.