Can be unstable
I like the app, but it crashed on me today. When I opened it, I was told I had 2 unfinished puzzles. I knew I had none, so I looked at them. The first was a puzzle I had successfully completed yesterday. The second was a blank puzzle with some random letter scattered through it. After I looked at it, the app superimposed the two puzzles and would not let me get rid of them. I finally had to close and delete the app, losing my entire puzzle history and credits.
No tortoise about
Crossword Puzzles!, v1.6.5