Wholesale business seeks time tracking system

We are a wholesaler of paints and care products and are looking for a time tracking system for our employees.

The system should meet the following requirements:

• Time tracking via terminal (new hardware must be purchased), also possible on a PC or via a web browser
• Project time
• Every employee should be able to view an overview of their current status (absences, overtime, vacation)
• Vacation planning
• Vacation approval
• Overtime management
• Optional interface to DATEV
• Optional app, but not that important

Three software workstations are planned.