Construction company looking for software for time recording and resource planning

We are active in track construction and are looking for software (possibly also various compatible solutions) with the following functions:

• mobile time recording for the construction site
• also possible offline
• booking to predefined activities, projects, locations
• as simple as possible with just a few clicks, self-explanatory
• shift planning for max. 15 employees with different skills/qualifications
• flexible and, as far as possible, automatic adjustment of this planning at any time in the event of illness or changes in customer requirements
• clear presentation of target/actual figures
• over-under coverage
• detailed time accounts for employees, showing overtime, remaining vacation, sick days, times relevant to bonuses (night, public holiday, etc.)
• shared calendar, all authorized employees can see each other's attendance/absence and appointments, everyone can enter their own appointments
• data transfer to Datev, if necessary data import from existing stationary time recording of office staff
• info function from the system to employees, e.g. about schedule changes
• contact directory/customer directory with history and document management, if applicable

Approx. 3-6 office workstations and up to 15 mobile accesses are planned for mobile time recording only.

Note from SoftGuide:

The possibly missing CRM and document management functions should be mapped with separate software.