This scenario is supported. Please note that the synchronization time itself must be taken into consideration when accessing the same account from various places. Each device may have a different synchronization interval. It is possible that not all devices will be up to date at the same moment and that it may take somewhat longer before the latest data is displayed. When the account is accessed simultaneously, it is also possible that changes are overwritten without being noticed, because someone else with a different smartphone has synchronized any changes more quickly.