Buddy punching costs construction businesses real money, and most site managers don't realize how often it happens until payroll running over budget becomes a noticeable pattern. The best GPS time clock apps address this problem by tying clock-ins to verified locations,but choosing the wrong one can still mean unreliable GPS in areas with poor signal, frustrated crews who resist another app, and privacy concerns that create more problems than they solve. To identify the strongest options, we compared GPS time clock apps using public reviews, feature documentation, and construction-specific capabilities.