Lots of fun except... – KenKen Classic Review

I really enjoy this app with two major problems (1 star lost for each). The first problem is that, as previous reviewers mentioned, you only get 50 puzzles for free. Puzzles after that have to be purchased. I would rather either pay a one time fee for unlimited puzzles or show me ads like other free apps. Second, again mentioned by another reviewer, not all the problems can be solved with logic as they are computer generated. I have found a few that I had to guess rather than using logic. I understand the benefit of computer generated puzzles but perhaps they ought to spend some time doing human testing before publishing.
Review by Kineticv on KenKen Classic.