SAN FRANCISCO – Apple on Dec 9 said it shut down third-party applications that enabled Android devices to use the iMessage service to communicate with iPhone users. 

The iPhone maker said in a statement that it “took steps to protect our users by blocking techniques that exploit fake credentials in order to gain access to iMessage”.

It added that “these techniques posed significant risks to user security and privacy, including the potential for metadata exposure and enabling unwanted messages, spam and phishing attacks”.

The company said it would continue to make changes in the future to protect its users.

The announcement came a day after Beeper Mini, the latest app to enable iMessage on Android devices, stopped working. Apple’s iMessage offers encrypted messaging between iPhones, Macs, iPads and other devices made by the company, and it has resisted calls for nearly a decade to expand the service to Android. 

Some users have long argued that the lack of an iMessage app for Android makes messaging between the two platforms less secure.

Apple recently said it would support RCS, or rich communication services, later in 2024. That is a replacement for the standard SMS service that will enable an improved texting experience between platforms. 

Beeper was founded by Mr Eric Migicovsky, who is known for creating the Pebble smartwatch in the years before the Apple Watch and for being part of Y Combinator, the tech industry’s most prestigious business incubator.

In an interview, Mr Migicovsky said his new company continues to work on Beeper Mini and is “feeling good” about again bypassing Apple’s restrictions.

He said Beeper Cloud – a variant of Beeper Mini – is still working. Beeper Mini, he says, is more secure and connects directly to Apple services, while Beeper Cloud uses third-party servers. 

“The passion and energy people had this week is indicative of the importance of what we’re doing,” Mr Migicovsky said.

He denied that Beeper Mini creates security issues for users, saying his app enables encrypted messaging between Android and iOS, so less security is a false notion. 

Mr Migicovsky, who said he has not heard from Apple about his service, was selling Beeper Mini for a US$1.99 (S$2.70) a month subscription after a one-week free trial. Apple does not charge a subscription to use iMessage on its devices. 

Apple said it cannot verify that messages sent through unauthorised systems that masquerade the use of Apple credentials are actually end-to-end encrypted.

Other services, including one called Sunbird, previously tried to make iMessage work on Android. Those efforts were also shuttered by Apple. 

Despite adding support for RCS in 2024, Apple executives have publicly and privately shot down the idea of making it easier for iOS and Android users to communicate.

In 2022, Apple chief executive Tim Cook suggested that a user who wanted to more easily message his mother on Android buy her an iPhone.

Mr Craig Federighi, Apple’s software engineering chief, said in an e-mail to fellow executives several years ago that “iMessage on Android would simply serve to remove an obstacle to iPhone families giving their kids Android phones”.

The company’s operating systems will further open up in 2024 in the European Union with the Digital Markets Act, which will require Apple to allow third-party app stores in the region. BLOOMBERG