I think its fine the way it is. I've paid for some truly awful apps and regretted it. If I can download an app, get a feel for it, like it, then upgrade the basic features in it then I'm a happy customer. rather than having spent $7 on something I'll never use again and be bitter about paying for. (I can't really be bitter about wasting 69p but that does add up to quite a large amount after a while!)