Apple is believed to have already sold 2.79 million Apple Watch units. Slice Intelligence has released a report that provides information not currently offered up by Apple itself. Apple has remained quiet about the Watch's sales since the device became available earlier in 2015. A survey of 2 million US shoppers brought Slice to the estimate of 2.79 million sales.

Slice's report used data that came from scanning e-mail receipts and because Watch sales were limited to online until recently, the report is probably quite accurate. Slice has also said 17% of customers buy an extra band with the plastic sports band ($49) being the most popular. Extra band sales are great for Apple since the plastic sport one only costs $2.05 to make.

A million of the 2.79 million sales occurred just in the first few days after the Apple Watch became available.