There's been plenty of speculation about the newest iPhone and its features, but what about the headphones that come with the device?

According to a reliable leak website, Secret, Apple's newest headphones will allow users to track their heart rate and blood pressure. Additionally, the headphones will use iBeacon tracking service to help locate them if they are lost.

The author who posted the rumor on the Secret App claims to have been let go from Apple last week.

He said, "I'm not the only person who got sent home for good last week." 

The headphones would make sense. In iOS 8, Apple will likely incorporate a "Healthbook" app that will track fitness for iPhone users. The app will likely be able to track blood pressure, hydration levels and more.

"You see so many people running with headphones in an a smartphone or music player attached," said Ben Wood, chief of research at the research company CCS Insight told the Guardian. "This is totally, utterly rational as a product direction for Apple. It's been widely investigated by other manufacturers, but as always with Apple, they're great at taking an existing technology and improving the user experience." 

Wood said that he can't take anything posted on Secret as credible but added that incorporating sensors into the Apple headphones is "the next rational step."

The Secret App has been an outlet for anonymous posts in the past. Often people working for Silicon Valley companies will release details of confidential information to Secret.

Just last month, someone posted on Secret that Nike was ending its Fuelband division. That ended up being true.

Wood says other companies like Intel and LG are already trying to introduce headphones with similar sensors and that Samsung's Galaxy S5 already has the health and fitness apps. The Galaxy S5 attempts to measure heart rate with having a user put their finger up to the camera.