We are a MDM Vendor. Lets take a app say Google calender. When we get this app details using http://itunes.apple.com/searchAPI , we get the 'supported device' as iPhone, iPadResponse is as follows.{
When we use the contentMetadataLookupUrl API :https://uclient-api.itunes.apple.com/WebObjects/MZStorePlatform.woa/wa/lookup?version=2&id=361309726&p=mdm-lookup&caller=MDM&platform=itunes&cc=us&l=en.We get the device family as 'deviceFamilies':['iphone','ipod'] 
Cryptopus App Logo & Appicon. Would you like to be a Author? If you want to be GFXTRA AUTHOR, send your portfolio links and short info to HERE. Appgraphics 1.1.
'appIcon': 'http://is4.mzstatic.com/image/thumb/Purple122/v4/77/a0/bb/77a0bb06-41e5-3743-452f-0bcbb6a44591/source/60x60bb.jpg', 'trackViewUrl': 'https://itunes.apple.com/us/app/google-calendar-make-the-most-of-every-day/id909319292?mt=8&uo=4',AppIcon 是一个方便的应用程序，允许您一次性导出iOS，Apple Watch，Mac和Android应用程序所需的各种大小的图标图像，告别麻烦的调整任务，加速您的应用程序开发！您只需要为所有图标准备一个原始图像文件。之后将其拖入。所有类型的PNG文件都可以立即导出。. Each download we provide is subject to periodical scanning, but we strongly recommend you check the package for viruses on your side before running the installation. The download is provided as is, with no modifications or changes made on our side. The version of AppIcon for Mac you are about to download is 1.7.4.
'trackId': 909319292, 'price': 0, 'bundleId': 'com.google.calendar', 'appCategory': 'Productivity', 'supportedDevices': 'iPhone, iPad', 'trackName': 'Google Calendar: make the most of every day', 'isPaidApp': false, 'version': '1.7.4',App Icon 1 7 4 0
'deviceSupport': 1},When we use the contentMetadataLookupUrl API :https://uclient-api.itunes.apple.com/WebObjects/MZStorePlatform.woa/wa/lookup?version=2&id=361309726&p=mdm-lookup&caller=MDM&platform=itunes&cc=us&l=en.We get the device family as 'deviceFamilies':['iphone','ipod'] App Icon 1 7 4 Free
This app is listed in iPad's App store under 'iPhone only apps'.
We want to know the below.
Appicon 1.7.4 Free
1) Why there is a difference between itunes search API and uClient itunes API?
2) Can all the iPhone only apps be installed in iPad? Do we have any limitations for the same.