5 stars: Overall, I did appreciate the smoothness of the interface and the auto-fill feature. Good app! Second puzzle I tried was missing a full stop. A 'report' button is provided, however. It would be fun to see an additional difficulty mode where spaces and punctuation are removed (...) Update: thank you to the Devs for pointing me towards 'guru mode'! Makes the game very challenging, and avoids the punctuation issue altogether!
5 stars: Really enjoyable. Ads, but very reasonable and not bothersome. The reward after ad is very reliable. Easy to use interface and very simple design which I love so I can focus on the puzzles. Lots of variation. I haven't seen a repeat yet. I highly recommend.
4 stars: It's like the crypto puzzles you might have seen in the newspaper. Only better, because it fills out the rest of your guess as soon as you put in a letter. It makes for easier iterations on your decryption. I wish there were ways to earn hints beyond just the one per puzzle other than buying them. I sometimes just feel like giving up after making no progress for ten minutes and there's no way to go back to puzzles after opening a new one.
4 stars: Great! Addicting! And every time I have to leave the app to do something else the app behaves very strangely when I return to it, until I close the app and start over. This is even the case with ads in the app. This gets annoying but I like it enough to keep going through the motions every time.
2 stars: The app seems ...