Is Internet connection required to clock in/out?

Plans: Time, Advanced, HR Starter, HR Professional and HR Enterprise. 

Yes, an Internet connection will always be required if the clock ins/outs are made from the computer panel or the mobile app. However, there is an exception in the case of the Tablet. The Tablet stores the clock in/out even if it is not connected to the Internet. It will not be lost and it will be sent once it can be reconnected to the network.