Use Your iPhone to Link to an iPhone App
In the App Store app, go to the app you want to link to and scroll to the bottom of the profile. Click the Tell a Friend button.
When the e-mail composing window pops up you’ll see a link. Select and copy that link.
Now you can paste that link wherever you need to.
Paste the App Link Into Your Post With the WordPress App
In your page/post, place the cursor where you want the link to appear or select the word(s) that you would like to link to the app.
Find and press the link button. Paste the link into the link field and press Insert.
That’s it! All the code you need will appear in your post/page (which you can of course modify if you know a little bit of HTML). Have fun!