All times are linked to a project and a customer. So before you can add any times you have to create a customer and a project.
The customer contains name, contact information etc. This information is used when you later on create an invoice or report.
When creating a customer by tapping on the plus-sign, you can choose to create it from an existing contact in contacts. If the contact does not contain all the information, you can add it later.
You can also choose to create a customer from scratch, then you have to enter all the information yourself.
On the customer page you can see summaries of times and money, total for the customer and the sum of not yet invoiced.
When the customer is created and saved you can go on to create a project.