There are people who will tell you that the most important thing to remember when trying to pick someone up is confidence, that you miss all the shots you never take, that the worst thing that can happen to you when you put yourself out there is hearing the word "no."

React Mobile is a personal safety app that acts like a blue-light emergency phone you can carry in your pocket. You can use it to stay in touch with friends and family, update specific contacts with your location, and discreetly call for help. Who could have used ReactMobile: Victims of the London Beer Flood Update: Heading home from work. Track my progress using my phone's GPS. Update: A 135,000-gallon vat of beer has erupted, destroying…