Just head on over to their “contact us” page. You can shoot them an email or place a phone call and their customer support will handle your request. Oshen Watch Support Page >>>. Can I use the exercise tracker without my mobile phone? It is possible to use the health tracker without a smartphone. Some smar twatches can be connected to a computer, while others can display data completely without being connected to a computer or mobile phone. 3. When does this smar twatch need to be charged? When the smar twatch needs to be charged depends mainly on how long it is used. Someone who wears the watch all the time usually needs to charge it more often than someone who uses it only rarely. 4.