The In-App PRO upgrade for the official Alien Blue reddit client is currently FREE for iPhone.
Download the app and hit the Pro button to get the Free Pro Upgrade In-App Purchase!
The iPaid version doesn't have an In-App Purchase, so you can just download the app, which went free.
There are rumors, that the iPad version will be discontinued and that one app will go universal. So better get both apps, if you own an iPad.