Apple hasn't revealed specific sales figures for the Apple Watch since its launch in April.

However, analytics firm Slice Intelligence has pulled together some data that claims to give us an idea of what sales have been like over the past few months.

And it doesn't look good.

Slice Intelligence shared a chart with Business Insider that shows how sales have progressed day-by-day from mid-April through the beginning of July.

On April 13, Apple was selling about 35,000 watches per day, according to Slice. But that number has dipped significantly since then. On July 2, Apple sold more than 5,000 Apple Watches per day, the chart indicates.

It seems as if there's been a steady decline in day-by-day sales except for a few noticeable spikes, such as one on June 2, which you'll notice in the chart below.

Slice Intelligence

Slice Intelligence bases these numbers on e-receipt data it received from its panel of 2.5 million online shoppers in the U.S.

The data may not be perfect, but it backs up what some Wall Street analysts have previously said about the Apple Watch. In a note to clients, Andy Hargreaves from Pacific Crest wrote that "store visits, Google search volume, third-party data and recent supply checks all suggest demand for Apple Watch has fallen sharply from initial levels."

Apple has remained quiet when it comes to sales numbers for the Apple Watch. It didn't issue a press release to announce opening weekend sales like it does with the iPhone, but Slice Intelligence previously estimated that there were 1 million orders for the Apple Watch in its first weekend on the market.

When Re/code's Walt Mossberg asked Apple's Jeff Williams how many watches have been sold, Williams replied: "A lot, but not enough. The only number I’ll give you is that demand divided by supply is greater than one, and so that’s all I’ve got for you, Walt. It’s a lot."

Apple declined to provide comment for this story.