Using multiple user accounts is not possible with the ViFit touch Activity Tracker.
To ensure proper assignment of data, this was renounced.
But, you can synchronise the ViFit Touch Activity Tracker with different accounts, because -unlike your VitaDock online Account- the tracker is not password- protected. Because of this, you can access your data on different accounts. For this reason we advise that you don't leave your tracker unsupervised.