I think low ratings on apparently decent free apps are mostly down to users not reading the app's description, finding it doesn't do what they (semi-randomly) imagined it would, and marking it poorly in the pre-iOS 4 rate-on-delete pop-up.
My most recent app politely and unobtrusively asks to be reviewed after 10 uses, on the thinking that users who've stuck it this long probably don't hate it. I forget which other app I learned this trick from, but it seems to have helped a little.
My most recent app politely and unobtrusively asks to be reviewed after 10 uses, on the thinking that users who've stuck it this long probably don't hate it. I forget which other app I learned this trick from, but it seems to have helped a little.