In-app purchases (non-consumable) cannot be transferred from Ipad 2 to Ipad Air. I tried this for an app called Calculator for iPad Free.

On my iPad2 I made an in-app purchase to get rid of ads in an app called Calculator for iPad Free.

The ads free version works great on my iPad2. When I bought an iPad Air I restored all aps and music from my iCloud.

The app Calculator for iPad Free has reverted back to the version with ads. Attempts to restore from iCloud, iTunes and backups have all resulted in the version with ads.

It appears that non-consumable in-app purchases cannot be transferred. To make matters worse, the in-app purchase price has doubled since I bought it in 2011.

Good for Apple, not so good for the consumer.