Projects can be imported, but how can possible sub-projects and their timestamps be imported?

You can import projects, sub-projects and timestamps from other software using .csv files. You only have to fill in the fields according to the format in the Xpert-Timer. It is best to create a sample .csv file from XTAdmin in the Import/Export area. This allows you to see which fields you need for the import.

Alternatively, our REST API is also available for import/export. You can use it to connect other programs to the Xpert-Timer. You can find the documentation for this at: https://www.xperttimer.de/en/xtapi.