OpenTimeClock

Open Time Clock is a free online time clock software solution to track employees' work time and attendance for payroll processing. It can also track task-specific hours, ensuring accurate billing for your client's projects. It includes a browser web app, smartphone app, and desktop app. It has more options for employees to clock in, such as username password clock, face recognition clock, PIN clock, QR Code clock, RFID clock, group clock, offline clock, etc.

Free technical support is included, with toll-free phone call, live chat, zoom live demo and email tickets. In other words, this time clock app service is free and have more clock in options than its competitors.