What technology is the Time Doctor desktop app built on?

We use Electron JS

Electron JS is a framework for creating desktop applications with all the emerging technologies including JavaScript, HTML and CSS. Basically, Electron framework takes care of the hard parts so that we can focus on the core of the application and revolutionize its design. Designed as an open-source framework, Electron combines the best web technologies and is a cross-platform – meaning that it is easily compatible with Mac, Windows and Linux. It comes with automatic updates, native menus and notifications as well as crash reporting, debugging and profiling. Some of the most popular desktop apps such as Basecamp 3, Discord, Slack, Skype, Trello, WordPress, WhatsApp and more are built on Electron JS framework.