Is it also possible to book only the duration of the project, i.e. effort per day, but without the time (from/to)?

The time stamps in the Xpert-Timer are the heart of the software. It was specially developed to document exactly what time, how long, what activity was carried out. This is the only way services can be billed accurately.

However, you only want to record the duration, but not the exact time frame? That is possible. However, the time is still set in the background. You can hide the times in the evaluations at any time. This gives you a report without from/to times.