The reaction to the Blaze encapsulates the predicament facing Fitbit, the young company that has been a leader in wearable technology: In many people’s eyes, it lives in the shadow of Apple, the Silicon Valley behemoth whose touch-screen smartwatch could potentially stomp its smaller rival out of existence.

This even though Fitbit has been trying to do everything right — and has largely succeeded.

Fitbit, which went public last year, has been increasing revenue at a rate of more than 90 percent as sales of its fitness trackers soar. Last year, Fitbit sold 21.3 million devices, almost double the 10.9 million it sold in 2014. Fitbit, scheduled to report earnings on Wednesday, is also the world’s largest maker of wearable devices by market share, according to the research firm IDC.

Yet the fact that Fitbit’s products focus on one thing — tracking your fitness — is not helping the company’s image in this era of Swiss Army knife devices, where products like the iPhone and Apple Watch can do multiple things. History has been unkind to single-purpose gadgets, many of which have flopped, like Cisco’s Flip camcorder, or have struggled, like the action camera from GoPro.

Competing with Apple, whose cash hoard exceeds the size of many countries’ gross domestic product, is also not easy. Although Apple last week reported its first sales decline ever in iPhones, Apple Watch sales appear to be growing. Apple does not break out sales of the watch, but analysts estimate it has sold 12 million of them since the product’s April 2015 debut.

Image The Fitbit Blaze.

As a result, Fitbit’s stock has fallen about 10 percent since it went public last June. “There were concerns around competition, particularly from Apple,” Katy Huberty, an analyst at Morgan Stanley, said of investor skepticism around Fitbit.