Last week, Apple reopened its first five stores in the United States, requiring customers and employees to undergo temperature checks and wear masks before entering the premises.
Apple does not disclose its retail store revenue.
"Our commitment is to reopen our stores when we are confident the environment is safe," Deirdre O'Brien, Apple's head of retail, wrote on Sunday in a note on the company's website.
Apple will this week reopen more than 25 of its branded stores in the United States, the company said on Sunday, continuing a gradual process that has unlocked doors at nearly a fifth of its worldwide retail outlets.
Apple has 510 stores worldwide and 271 in the United States.