Padgram by Pinssible Labs in an Instagram app specifically for the iPad.
Padgram gives you an Instagram app with such photo categories as pets, cars, fashion, architecture, kids, food, and nature. You can check out these photos by category or through the Map view.
If you subscribe you'll be given more than 500 Emoji symbols and be able to comment on pictures you see. It doesn't matter whether you like prefer portrait or landscape mode, both are fully supported.
When you perform a search you can do so by a user name or by tag. Find a tag you like and you can subscribe to it. Photos are all shown in full size and you can use the swipe feature to scroll through them.
There are a number of ways to share photos. You can share via email, Twitter, Facebook, Pocket, Pinterest, and Sina Weibo.
The iPad gives you a number of great advantages too such as the Retina display, the incredibly fast speeds, and it uses stacked layout which helps you quickly return to where you were.
The only downfall is that the Instagram API app doesn't allow you to upload photos. There is a link you can use to install the official Instagram iPhone app that allows you to take and upload your pictures.
Padgram was updated on Jan. 29, 2013 and has 286 customer ratings with an average rating of four and a half stars out of five.
I enjoyed how easy this app was to use. You could really make it as simple or as complex as you like.