Check the ratio is a website which helps you check the ratio of boys and girls in night clubs. We created a site using ASP.net and SQL server. We also created mobile website for them. We also created a mobile app for collecting data of users who are checking in the clubs using their driving license. We have used a card reading device Linea Pro http://ipclineapro.com/. We have used sdk provided by them to collect data from driving license of users.