Startup Idea : Blood donation app

Donating blood is always a good thing. Sometimes, people die due to lack of matching blood group available to them in time. What if we can create an app which can make appointments for you to donate blood in local nearby clinic. The app can work as a social network where people can share their achievement and be proud of it. With the use of gps, it would be awesome if you can track poeple willing to donate around you too. It's just an idea. Feedbacks and discussions are welcome.