The rollout featured a further expansion of the company’s in-house-designed processor chips to the iMac desktop computer. The chip change was part of a full iMac redesign—the first significant redesign of Apple’s popular desktop since 2012. Apple also said it is bringing its new chips to the high-end iPad Pro, which comes with a brighter screen and speedy fifth-generation, or 5G, connectivity.

The Cupertino, Calif.-based company began offering the faster 5G technology in its newest iPhones last fall, helping juice sales for the device. iPad sales rose 41% in the October-to-December quarter to $8.4 billion, and other Apple products such as its Mac computers, watches and wireless headphones also saw sales increases because of the pandemic.

Apple shares fell about 1.3% Tuesday.

The tech giant topped $100 billion in quarterly sales for the first time as consumers flocked to new iterations of the iPhone and other devices.

Analysts surveyed by FactSet, on average, expect iPad sales to fall in the second half of the fiscal year compared with a year ago, but still finish 2021 in September better than a year earlier.

The latest iPad Pro will be available to order April 30. The device starts at $799, while the larger version with its brighter screen will begin at $1,099. The iMac, which will be offered in a variety of colors, begins at $1,299. Apple’s new M1 chip will allow the desktop to be much slimmer, according to the company.

The development of a paid subscription option within Apple’s podcast app comes with a revamp of that app.

It underscores a core strategy that Chief Executive Officer

Tim Cook

has been championing since well before the pandemic, one focused on building out the company’s digital services to fuel growth and keep consumers even more closely tied with Apple’s ecosystem. The tech giant’s services division generated almost $16 billion in sales in the quarter that ended in December, an almost 25% increase from the same period the previous year.

Mr. Cook’s services-driven strategy will put Apple in closer competition with companies that operate on its devices. Some of those businesses have grown more vocal in complaints about Apple, saying it uses its might in anticompetitive ways.

The European Union has opened formal probes into Apple in part after Spotify accused the tech giant of abusing its control over how apps appear in its App Store. Apple has denied wrongdoing. Spotify has complained for years that Apple aimed to limit competition to benefit its own streaming service.

Executives from Spotify, Tile, Apple, Google and

Match Group Inc.

—a dating company that owns the app Tinder and other properties—are set to testify Wednesday in a hearing before a U.S. Senate subcommittee focused on competition and antitrust issues.

In 2005, Apple helped make podcasts mainstream by bringing the medium to iTunes. The format has taken off since then with listeners and advertisers, and tech companies have been scrambling recently to beef up their offerings.

Spotify has said it plans to launch a subscription podcasting model that would let certain podcasters charge listeners for access on the streaming service. The new subscription options are set to be announced on Spotify as soon as next month, according to people familiar with the matter.

The streaming company has been adding subscribers thanks to its focus on podcasts, spending big money to lock in high-profile talent such as

Joe Rogan.

Amazon.com Inc.

has signaled its expanded interest in podcasts by purchasing Wondery.

Spotify is set to overtake Apple in terms of U.S. podcast listeners this year, according to a forecast from research firm eMarketer. An average of 28.2 million people in the U.S. will listen to podcasts on Spotify at least monthly, while 28 million will listen through Apple Podcasts, eMarketer said.

In 2019, Apple’s market share was 34% of podcast listeners, which is set to fall to 23.8% in 2021, according to eMarketer.

The tracking device revealed Tuesday had been expected for a while. Called AirTag, the devices can be affixed to users’ bags or other items to track with their iPhone, similar to a product by Tile.

Tile has complained that Apple has made it harder to use its service in advance of the expected AirTag rollout. The company’s allegations were part of a Congressional report last year on big tech companies’ practices that some have deemed unfair. Apple has denied wrongdoing.

“We welcome competition, as long as it is fair competition,” Tile CEO

CJ Prober

said in a statement. “Unfortunately, given Apple’s well documented history of using its platform advantage to unfairly limit competition for its products, we’re skeptical.”

Apple will begin taking orders for AirTag on Friday, with the products arriving April 30. They are selling for $29 apiece or as a four-pack for $99.

—Benjamin Mullin contributed to this article.

Write to Tim Higgins at Tim.Higgins@WSJ.com and Anne Steele at Anne.Steele@wsj.com