iMessage users had trouble communicating on Monday, taking to Twitter to vent their anger about Apple's messaging service.

“My iMessage” and “iMessage” was trending as users from across the globe began to notice that their messages were not sending. A 9To5Mac poll indicated that about 70 per cent of its followers were experiencing the problem, but Apple’s iCloud Status was reporting that all services were online.

“iMessage is down, huh? Good thing it’s not a super critical service people use to communicate with each other or anything,” one Twitter user wrote.

Another tweeted: “My iMessage isn’t working. Apple’s trying real hard to get us to order that new phone.”

Many iPhone, iPad, iPod touch and Mac users rely on iMessages to send texts over the internet, some to save money on their phone bill.

iMessage seems to be back up and running now, but this outage follows last week’s iCloud mail downtime, which lasted several days. Apple has now apologised to iCloud users for the issue.