Chances are you're looking at it right now.
Before you try and deny you're addicted, here are some stats to consider:
Australian men unlock their phones more than anyone in the world - on average 45 to 46 times a day, while for Australian women it is around 42 times.
Those figures have been calculated by AntiSocial, an app developed by Melbourne software company Bugbean, to monitor people's use of social media.
It is a free app with no ads that is only available on Android because the creators say Apple does not allow such monitoring, but the idea is to encourage users to put down their devices.
Australians spend around two hours a day on apps
According to AntiSocial's developer Chris Eade, Australian men and women spend about two hours a day on their phones, and that is not including use for music streaming, video streaming, or making calls - that is pure Facebook, web surfing, WhatsApp, Instagram, and Snapchat.
Adam Alter, from the Stern School of Business, has written a book called Irresistible - why we can't stop checking, scrolling, clicking and watching.
He told Lateline around 50 per cent of the adult population has some form of behavioural addiction.
"I think you can ask yourself if you have a problem and you'll know," he said.
"[People] feel that their lives are being encroached upon by devices, their social lives, maybe their relationships with their loved ones and friends. They're not experiencing nature. They're not exercising."
Our boredom threshold at rock bottom
Mr Alter said smartphones have changed human behaviour so much that we no longer allow ourselves to experience being bored.
"Our boredom threshold has declined to the point where you'll get in an elevator for five seconds, take out your phone," he said.
"Boredom is very important for productivity, for creativity and new ideas, and if you never allow yourself to be bored, you will never have those ideas."
Mr Alter has written about a private school near Silicon Valley that uses no technology, yet surprisingly 75 per cent of the students' parents work in the tech sector.
"You'd think their children would be the biggest users of tech. But what you actually find, it's the reverse that a lot of these tech titans refuse to let their kids near technology," he said.
"Steve Jobs in 2010 in an interview said things like, 'you should use this device, but we do not allow it in our home and we won't let our kids near it'. He was talking about the iPad."
How to break up with your device
Katina Michael, from the University of Wollongong's School of Computing and IT, specialises in online addiction, and she told Lateline that tech companies have a lot to answer for.
"I think it's extremely hypocritical," she said.
"The laptop's not made you smarter and more intelligent. I think the companies that Adam was talking about need to recheck their ethics and I think our children need to stop being sold the wrong story about what is going to make their future brighter. We have a lot to answer for as academics."
Professor Michael had this advice for tech addicts looking to wean themselves off their devices:
"Think about replacing the activities that you have done online with offline activities, whether it's going for physical exercise, joining a community group or just getting a job, or just speaking with your family and making real food instead of playing a game about making food," she said.
If you're still questioning whether or not you're addicted, compare how you stack up to AntiSocial's biggest user.
"Our biggest user we have at the moment is a woman in America who uses her phone for 7.5 hours a day, every day on average," Mr Eade said.
"That's a full time job."