Chấm công - Ghi công is a timesheet app developed by Đình Lập for Android users. It is designed for individual users who want to self-check their work hours, work days, and calculate necessary work hours for their jobs. The app is available for free in the Utilities & Tools category of the Google Play Store and does not require an internet connection to function.

The app is user-friendly and easy to navigate, providing users with a simple interface to create Excel timesheet files. Chấm công - Ghi công only requires memory read and write permissions to create these files. Users can also store their timesheet files on their device and perform calculations with ease. The app requires "Self-launch" and "Run in background" permissions to prevent notifications from being lost.