The main purpose of this thesis is to report on the process and the result of a creation of a web application. This application is a combination of two main parts: the website for the employer to monitor the time checked in by the employee, and a mobile app created using React Native for the employee to check in and check out of the workplace. Additionally, this thesis will not just go through the process but explain the thought process during the creation and the lesson learnt after finishing the project. The result of this project is a working, functional website and a mobile application for small businesses and their employees to monitor, check in and check out working time using GPS to validate location upon check-in and check-out. Most of the goals set out at the beginning are satis-fied. Further improvements in testing and features are planned and will be implemented in the nearest future.