The HammerTech Sign-in app works as an electronic sign-in book. Workers and/or visitors who are already in the HammerTech system can use this app to sign in and sign out when on site. The information collected from the HammerTech Sign-in app is directly entered into the Daily Report, and automatically calculates the number of workers and their hours on each project. The HammerTech Sign-in app also generates a list of people on site for the project, which can be used for communication and any emergency situations.