Thanks to Peace One Day every 21st September is an annual day of global unity and intercultural cooperation on a scale that humanity has never known before. Peace One Day is a non-profit organisation that wanted Chelsea Apps Factory to design an app that would inspire and enable people to contribute to a more peaceful and sustainable world.



Peace One Day took part in a 5 Day Challenge; a rapid process used to develop working prototypes to test on customers, before embarking on a full project. The 5-day challenge is a bit like a telescope into the future – it lets you see how your customers will react to your ideas and engage with your app before you spend a lot of time and money building a real product.

Image Break Black.png


In just 5 days the combined team from CAF and Peace One Day had developed a prototype product which was put in front of users to test reactions. It’s always a fascinating moment and you learn a lot very quickly about what works and what doesn’t.

As a result of the 5 Day Challenge the Peace One Day team was able to talk confidently about next steps, including how to raise funding for this app, how much funding would be needed and how quickly the app could be built and launched.
Who was on the team?


“Had we not come to Chelsea App and completed this 5-day challenge it would have taken us months to get to where we are now! We’ve learned so much during this process and we feel ready to talk to our corporate sponsors and potential investors to make this app a reality.”

- Jeremy Gilley (Founder, Peace One Day)