Unhappy users have launched into Twitter's new Fleets feature, accusing them of ripping off Instagram's Story function.

The social media giant introduced the add-on across its mobile platform on Wednesday.

Twitter say the posts, which disappear after 24 hours, were rolled out to make users feel more "comfortable" because uploads only last for a day.

While many are giving it a go, the Fleets have not gone down well with everyone - and some believe its a copy of photo-sharing app Instagram.

Snapchat, Facebook, YouTube and LinkedIn all have similar style features.

There has been some high-profile complaints, with former England star Gary Lineker saying he "hopes Fleets will be fleeting".

Twitter's new feature is all rather familiar

He wasn't the only one to kick up a stink.

In a viral tweet, popular tweeter Kat Hasty wrote: "If Twitter stories turns this app into something for pretty people I am going to be p****d - this app is for jokes and lies."

Another user said: "Fleets just an Insta rip off... do one".

And a third added: "What's the difference between Twitter's Fleet and Instagram stories?"

Some even threatened to step away from the platform unless an option to hide the addition was implemented.

Gary Lineker first presented Match of the Day back in 1999
TV star Gary Lineker hopes "Fleets will be fleeting"

While some aren't keen on the update, others love it.

One Twitter user said: “I got a lil excited about Twitter adding stories or Fleets, whatever.”

Another said: “I can’t be the only one who actually LIKES stories (Fleets) on Twitter. They’re cool!”

And a third added: “Am I the only one who actually likes Fleets? I only watch stories on Instagram so if they can just come over to Twitter I could forget Instagram ever existed.”

Will many be Fleeting - or will the idea fall flat?

Daily Star have approached Twitter for comment.

On a blog post, Twitter said: "We're launching Fleets so everyone can easily join the conversation in a new way – with their fleeting thoughts.

"Twitter’s purpose is to serve the public conversation – it’s where you go to see what's happening and talk about it. But some of you tell us that Tweeting is uncomfortable because it feels so public, so permanent, and like there's so much pressure to rack up Retweets and Likes.

"To help people feel more comfortable, we've been working on a lower pressure way for people to talk about what’s happening."