Updated: May 03, 2021 12:14 IST Epic charges that Apple has transformed a once-tiny digital storefront into an illegal monopoly that squeezes mobile apps for a significant slice of their earnings Share Article AAA Estimates of Apple's app store revenue range from $15 billion to $18 billion annually. | Photo Credit: AFP Epic charges that Apple has transformed a once-tiny digital storefront into an illegal monopoly that squeezes mobile apps for a significant slice of their earnings (Subscribe to our Today's Cache newsletter for a quick snapshot of top 5 tech stories. Click here to subscribe for free.) On Monday, Apple faces one of its most serious legal threats in recent years: A trial that threatens to upend its iron control over its app store, which brings in billions of dollars each year while feeding more than 1.6 billion iPhones, iPads, and other devices.