mattdeclaire

The plugin allows you to use an iOS app’s ID to import all the app’s related information into your posts. This includes using the app’s icon as the post’s featured image, importing all the screenshots into the gallery, and adding custom field information (app price, description, rating, release date, related urls, etc.).
You may find other plugins that allow you to create a <a href="https://codex.wordpress.org/Post_Types" rel="nofollow ugc">WordPress Custom Post Type</a> for apps. That would be useful if you wanted to store a list of apps and thier attributes. The advantages of that method include having a separate admin section for creating apps, and the ability to have an “app archive page”. But, it has the disadvantage of not showing up in your normal post feed. Custom Post Types are best used for special cases, not to replace posts.
This plugin simply adds to the standard post functionality. It’s best used when you simply want to write about an app, and have your post show up among the other posts on your site. If you want to have a special archive for your app-specific posts, it’s best to create a category.

iPosts

Import iOS app information into your posts, including icon and screenshots.

mjar81

This is a simple WordPress plugin that you can modify to fit your own needs. Use your iOS’s application id and it will spit out some basic HTML that you can then apply your own styling to.
Why?
I wanted to make sure that I had accurate descriptions and current pricing information for all my apps wherever I display this data on my personal websites. This was the natural thing to do.
Check out the example of what it produces here: http://www.mohawkapps.com/checkout-helper/
<h3>Advanced Usage</h3>
You can also use the following shortcodes to pull only parts of the application’s data. Please note that you must also pass the id to these shortcodes as well of the plugin won’t know what application you want the data for.
<ul>
<li>name</li>
<li>icon</li>
<li>icon_url</li>
<li>version</li>
<li>price</li>
<li>release_notes</li>
<li>description</li>
<li>rating</li>
<li>iphoness</li>
<li>ipadss</li>
<li>itunes_link</li>
</ul>
This plugin will cache the data from your application in the WordPress database for 24 hours. Application icons and screenshots are cached on your server by default but if you’d like to pull those images directly from Apple’s CDN servers (usually faster), change the value of IOS_APP_PAGE_CACHE_IMAGES to false

App Display Page

Adds a shortcode to display information about iOS apps from Apple's App Store.

iPosts vs App Display Page