This bothered my with the iPhone apps, then it was the iPad apps. You have to buy the stinking program just to figure out you dont like the interface, the this or that about it. So you go down the list to the next one that does the same thing but a bit different, and roll the dice again. Makes me want to just avoid the app store all together.
Bring back the 10-30 day trails. If I like it, I would even pay more then. I feel abused enough for all the programs I bought for my i-devices that I ended up using once and deleting.
And there not even trying to help with the sales page. They show you a handful of screenshots that are too small to see any useful info, YOU CAN'T even ZOOM IN!!!!
arggggg....sorry for the rant
Developers are free to provide trials of apps they sell in the Mac App Store and additional information about their iOS and Mac apps on their own websites.