Apple has announced that it has taken steps to disable the iMessage function in the Beeper Mini application for Android users. The app itself stopped working on Friday afternoon. Apple noted that the decision was due to concerns about the security and privacy of users, as the program’s methods allegedly involved the use of fake credentials to access iMessage.

In a statement to 9to5Mac, Apple emphasized that Beeper Mini’s methods pose significant risks, including potentially exposing metadata and facilitating the receipt of unwanted messages, spam, and phishing attacks. The company has expressed concern that messages sent via Beeper Mini may not support end-to-end encryption and may not be accessible only to the sender and recipient.

The Beeper Mini app, which was introduced earlier this week, connects directly to iMessage, allowing Android users to send messages to iPhones without using Beeper’s servers.

Beeper Cloud, the company’s other service that routes iMessages through a Mac, was back on Saturday morning, but Beeper Mini is still down.