Apple later approved the update on Monday after reached for comment by Business Insider. The company pointed to the fact that BlueMail is approved and available in the App Store without "Sign in with Apple" functionality in alignment with its App Store guidelines.
Companies like Spotify, Epic Games, and Tinder-parent Match Group have recently argued Apple's rules and policies have made it difficult for apps to compete in the App Store — in which Apple is both the operator and a competitor. In one of the most high-profile clashes yet, Apple has been locked in over its removal of "Fortnite" from the App Store because the game maker attempted to skirt Apple's in-app payments system.
Shortly after Business Insider reached out to Apple for comment on Blix's concerns, BlueMail's app updates were suddenly approved, Volach told Business Insider on Monday. Volach said the company did not make any changes to its submitted app update, nor appeal any of Apple's rejections, since receiving a rejection from Apple on September 15.
support if an app offers other social login options. The issue, however, involves an exception listed in Apple's guidelines that exempts apps that are a client for a specific third-party service and users are required to sign into their email or social media account directly to access their content.