The attendance system in a company is very important for employees and company owners. Benefits for employees are to improve discipline and manage time management. The benefit for the owner is that he can monitor employee discipline more efficiently and can develop the company starting with employee discipline. At one company, namely CV. Techarea Indonesia Jaya does not yet have a manual or internet-based attendance system. Which causes disorganized employee discipline. Due to the irregularity of the employee, the company owner cannot monitor the discipline of every employee who works. An attendance system was designed using IoT-based RFID. This tool was tested on six employee of CVTecharea Indonesia Jaya and five customers who have an informatics student background. The testresults show that the CRUD, dynamic time setting, PDF recap feature work well. The results of our tests were carried out with two diffent operating systems on IOS and android and can run functionally and responsively. The results of the user questionnare show that 81,4 % of CV Techarea Indonesia Jayaemployee and 88 % for customers from informatics student backgrounds who show indicators of being quite satisfied.