Only on tablet-built apps. Foursquare (for example) only has a phone app.

on a N7: https://www.dropbox.com/s/vhy3ucrsmvtui76/Screenshot_2012-07...

and on an iPad 3: https://www.dropbox.com/s/gao416zu3ltikra/Photo%20Jul%2021%2...

Except the difference is: there are tens of thousands of iPad apps. How many Android apps are optimized for tablets?

(Silly example btw, who would use Foursquare on a 10" tablet?)

The point is that there's less of a need for a separate tablet version of many Android apps than there is for iPhone/iPad since Android's scaling is much more sophisticated.

iPad versions of apps aren't simply about scaling the UI. Take Twitter on Android tablets[0] for example, it's clear that merely enlarging the UI elements doesn't automatically result in an awesome UI on tablets.

Similarly, an UI design that works great on a phone (like with gestures from the side) might feel awkward on tablets.

[0]: http://www4.pcmag.com/media/images/285099-twitter-for-androi...

I write ipad apps for a living. I understand how scaling works.

The point is that a scaled up android app will usually look a lot better than a scaled up iphone app.

iPhone apps render at 3:2 rather than reformat to fit the iPad's 4:3 screen.