The pair won the ITV2 series on earlier on in the summer after six weeks inside the Love Island villa, sharing the show's £50,000 prize fund.
The couple had been quick to play down their romance after they left despite declaring themselves officially boyfriend and girlfriend - and sleeping together - on the show.
"We have a laugh together but we are not madly in love or anything like that," Jessica said previously.
She said of her potential future with Max: "We are not going to move in together or anything like that - it's a bit soon."
The duo did give things a go despite living some 200 miles apart but the relationship looked to be on the rocks pretty soon after following a very public row.
Yesterday both Max and Jess 'took to Twitter' to announce their split.
"Some things are just not meant to be... #LoveIsland #JAX" tweeted Jess along with a heartbroken emjoi.
Max added: "We gave it our best shot"
Love Island, hosted by Caroline Flack, airs on ITV2.