20 Day Stranger is an iPhone app that reveals intimate, shared connections between two anonymous individuals. It’s a mobile experience that exchanges one person’s experience of the world with another’s, while preserving anonymity on both sides.

For 20 days, you and a stranger will experience the world in your own way, together. You’ll never know who it is or exactly where they are, but MIT Media Lab hope the experience will reveal enough about someone to build your imagination of their life… and more broadly, the imagination of strangers everywhere.  You get to send a single text at the end of 20 days to your stranger…

Apply to participate here


The idea has been imagined, designed and deployed by MIT Media Lab Playful Systems & The Dalai Lama Center for Ethics and Transformative Values at MIT, which is dedicated to inquiry, dialogue, and education on the ethical and humane dimensions of life. As a collaborative and nonpartisan think tank, The Center focuses on the development of interdisciplinary research and programs in varied fields of knowledge, from science and technology to education and international relations. Our programs emphasize responsibility and examine meaningfulness and moral purpose between individuals, organisations, and societies.

The Center was founded to honour the vision of the Fourteenth Dalai Lama and his call for a holistic education that includes the development of human and global ethics.