查询appStore的应用版本信息

比如查看微信相关的app

http://itunes.apple.com/search?term=微信&entity=software

查看某应用的版本等详细信息

http://itunes.apple.com/lookup?id=APP_ID

这样就可以判断最近版本来提示更新

所有的API

The following are examples of fully-qualified URLs for specific lookup requests:

• Look up Jack Johnson by iTunes artist ID:

  https://itunes.apple.com/lookup?id=909253

• Look up Yelp Software application by iTunes ID:

  https://itunes.apple.com/lookup?id=284910350

• Look up Jack Johnson by AMG artist ID:

  https://itunes.apple.com/lookup?amgArtistId=468749

• Look up multiple artists by their AMG artist IDs:

  https://itunes.apple.com/lookup?amgArtistId=468749,5723

• Look up all albums for Jack Johnson:

  https://itunes.apple.com/lookup?id=909253&entity=album

• Look up multiple artists by their AMG artist IDs and get each artist's top 5 albums:

  https://itunes.apple.com/lookup?amgArtistId=468749,5723&entity=album&limit=5

• Look up multiple artists by their AMG artist IDs and get each artist's 5 most recent songs:

  https://itunes.apple.com/lookup?amgArtistId=468749,5723&entity=song&limit=5&sort=recent

• Look up an album or video by its UPC:

  https://itunes.apple.com/lookup?upc=720642462928

• Look up an album by its UPC, including the tracks on that album:

  https://itunes.apple.com/lookup?upc=720642462928&entity=song

• Look up an album by its AMG Album ID:

  https://itunes.apple.com/lookup?amgAlbumId=15175,15176,15177,15178,15183,15184,15187,1519,15191,15195,15197,15198

• Look up a Movie by AMG Video ID:

  https://itunes.apple.com/lookup?amgVideoId=17120

• Look up a book by its 13 digit ISBN:

  https://itunes.apple.com/lookup?isbn=9780316069359