I use iTunes API lookup to get app data by App ID this way:
http://itunes.apple.com/lookup?id=543891460&lang=ru
Even if app is designed for iPhone5, in JSON I get 3.5 inch screenshots (under screenshotUrls array).
Is there any way to get 4 inch. screenshots?
Check again.
Apple seems to be rolling out new 4 inch screenshots since a few hours.
Screenshots now also have the pixel-size in the filename. Well, kind of: it doesn’t seem to be 100% correct (yet?). The possible values are:
- xxx.xxxxxxxx.1136x1136-75.jpg (4" iPhone)
- xxx.xxxxxxxx.320x480-75.jpg (3.5" iPhone)
- xxx.xxxxxxxx.480x480-75.jpg (iPad)
It is possible to access all screenshots using the inofficial iTunes Connect API:
https://itunesconnect.apple.com//WebObjects/iTunesConnect.woa/ra/apps/version/[app_id]
It contains all existing screenshots in all resolution in the original format.
Unfortunately I haven't found a way to map the language with the one used by the iTunes Transporter.
There is a pull request, adding this feature to deliver: https://github.com/KrauseFx/deliver/pull/113/files
Update: a mapping of language codes to languages can be found here: https://github.com/KrauseFx/deliver/blob/master/lib/assets/DeliverLanguageMapping.json
来源：https://stackoverflow.com/questions/16164847/itunes-lookup-api-get-iphone-5-app-screenshots