According to Slice Intelligence, Apple Watch saw an initial spike in orders after its launch but Fitbit still outsold Apple Watch during its launch-month.

Slice gathers data from e-mailed sales receipts for items bought online to monitor how well devices are selling in the U.S.

With 68 percent marketshare, Fitbit continued to separate itself from the competition among fitness tracker makers, according to the data. After a healthy holiday sales season, Fitbit saw a resurgence of sales with the January launch of its Charge HR, a device that added a heart-rate monitor and sleep tracking capabilities to Fitbit, and took market share from competitors.

Slice Intelligence noted that it did observe a some softness with Fitbit leading up to the launch of the Apple Watch – with the lowest sales occurring the day that Apple Watch launched. However, sales quickly recovered; indicating that Fitbit shoppers may have waited to see the Apple Watch and pricing, before making a purchase. In May, more Fitbit devices were sold online than Apple Watches – with 850,000 Fitbit devices sold versus 777,000 Apple Watches.

Slice Intelligence also found that consumers were not moving from Fitbit to the Apple Watch. Only 4.8 percent of those who bought a Fitbit also purchased an Apple Watch.

Finally, the majority of Fitbit sales online are coming from Fitbit.com, possibly indicating that consumers are seeking the device out specifically, versus buying it on a site where they might be researching other options. Unsurprisingly, Amazon sales represented the lion’s share of other sales, at 40 percent, followed distantly by Best Buy, comprising about 7 percent of online sales for Fitbit.

About This Data

With a panel of more than 2.5 million online shoppers, Slice Intelligence offers a detailed and precise digital commerce data available, reported daily.

Slice Intelligence is the only service to measure digital commerce directly from the consumer, across all retailers, at the item level, over time. This retailer-independent methodology accurately measures commerce as it happens. By extracting detailed information from hundreds of millions of aggregated and anonymized ereceipts, Slice can map the entire Purchase Graph, connecting each and every consumer to all their purchases.

Slice gets its data from e-receipts – not a browser, app or software installed by the end-user – so its measurement reflects comprehensive shopping behavior across multiple devices, over time, from a representative sample of online consumers. Slice Intelligence correlates to the U.S. Department of Commerce as well as public filings of leading e-commerce companies.

Slice's press release is here.