Google’s Defeat Threatens $200 Billion App Store Industry (2)

Google’s legal defeat at the hands of Fortnite maker Epic Games Inc. threatens to roil an app store duopoly with Apple Inc. that generates close to $200 billion a year and dictates how billions of consumers use mobile devices.

The loss — handed down by a San Francisco jury on Monday — is a blow to the two companies’ business model in apps, where they charge commissions of as much as 30% to software developers who typically have few other options. Google shares were down less than 1% in New York Tuesday morning at $132.62.

Epic has spent years railing ...