Is rotation a requirement for iPad apps?

Is it a requirement for iPad apps to be able to rotate?

I am looking at a few apps, one example is http://squareup.com they only have one rotation, while others have r开发者_开发百科otation. What is the exact spec?

It's not required but I've seen apps butchered for it in reviews. I believe I saw that for the app Facepad.

You do not have to support rotation; however almost all apps do.

At least support 180° rotation. Preferably 360°, but this depends on the content your app shows. Fir example, Keynote offers only landscape \w 180° rotation because slideshows are always in landscape.

It's not a requirement, but how'd you like it if Safari didn't rotate? When designing a UI, imagine you are the user, the one you make the app for. How does the user like it? And make it like that.

It's highly recommended to. If you don't want to do the work of re-laying-out your interface from portrait to landscape or vice versa, you can at least support the 180-degree rotation of whatever orientation you do want to use: landscape-right if it's set up for landscape-left, or portrait-upside-down if it's set up for portrait. It's the user-friendly thing to do and really not complicated to implement.

I don't think GarageBand suffers for not supporting it. It's right for it to be case-by-case