Shower with Friends is a hardware hack that helps you manage your water consumption by monitoring your shower’s flow rate. Accompanying the hardware hack is a mobile app that lets you compete against your friends as to who can take the shortest shower. With Shower with Friends, you would be alerted to how long you were in the shower today, and how many gallons of water were used, as compared to the previous day or days. You could then enable sharing of this data with your circle of friends and engage in competitions. You could also challenge your friends – similar to the Ice Bucket Challenge – to consume less (or as much) water as you did.

http://techcrunch.com/2014/09/07/shower-with-friends-wins-the-disrupt-sf-2014-hackathon-grand-prize-blitz-and-interactive-markdown-are-runners-up/?ncid=fb&utm_source=feedburner&utm_medium=feed&utm_campaign=fb