Firstly I'd like to say, that this app is fantastic and I have had no issues at all with it on my iPad 4.
The issue I do have with it, is the name. I know now that the 'HD' is referring to the iPad screen, however that was not until I had purchased the app and looked for answers here, as to why the quality of exported videos is so sh*t! Charging nearly $7 for the app and exporting videos that are terrible quality, and very grainy is not on. As I said, I found it very misleading, and it is essentially false advertising, because nowhere in the app description do you mention the lower quality of the exported video, unless you are using a desktop version with a subscription. The terrible export quality makes it unusable for my purposes and therefore I will be attempting to get a refund. If I have purchased your app for that price, I expect to be able to get the finished video in the same HD quality as the preview.
i strongly suggest you change the name of the app or put in the description that the export quality is limited, unless you have a subscription.