They dream the same dreams, they like the same apps, says Mplayit.
The same apps tend to be popular no matter what app store you look at, judging by a new piece of research from Mplayit.
The company, which runs an app discovery service on Facebook, has compared the most popular apps on iPhone, Android and BlackBerry among its users.
The answer? They tend to be the same ones.
So list-making app Evernote is the most popular in its genre on iPhone and Android, and second most popular on BlackBerry.
Pandora is top three on all three platforms in the music category, with iheartradio and Shazam both popular on two of them. Facebook and Nimbuzz are also popular on two of the three platforms in the social networking category.
The conclusion? Different smartphone owners aren't so different really - although we'd also point out that companies looking beyond iPhone with their apps are also reaping the benefits.
Mplayit suggests that the findings also show that the sheer scale of iPhone's 100,000-strong App Store isn't such a big advantage compared to Android's 20,000 apps and BlackBerry's 4,500.
"'How many apps?' is the wrong question," says CEO Michael Powers.
"People just want to get the job done. It doesn't matter if there are 50 different to-do list apps on iPhone, because Android or BlackBerry just need a couple of good ones to make consumers happy."
That's good news for Apple's rivals. "It's not really necessary to match Apple app-for-app to offer a compelling mobile experience," continues Powers.
"Android and other platforms only need to offer the best and the brightest, as well as the same
utility and features."
Mplayit's full chart of top-threes in the various categories is embedded below (click for full-size version).