I'm disappointed that they don't have a try-then-buy option. There are plenty of sub $10 apps that I would love to try out and wouldn't mind paying for if they

I'm disappointed that they don't have a try-then-buy option. There are plenty of sub $10 apps that I would love to try out and wouldn't mind paying for if they are good. But I don't like payng the money first and then learning that I don't like something about how they work. The "lite" version works, okay, but I'd rather just one version that I could try for free for a week to see if it sticks with me.