5 stars: FYI this is not really a free to play app. After your first page, the ads are too intrusive to play. However I've found it to be well worth the small purchase/upgrade price. Variety of designs, colors & textures, plus features to create your own mandalas and a new coloring page daily.
4 stars: There is a comfortable variety of options to color as well as color schemes to choose from with the ability to customize your own colors and other fun effects to add to your picture. It's free with ads but they aren't too invasive once you get used to them and they are mostly about other interesting games.
3 stars: Decent for a free app, but buggy. I want to actually color, as in draw strokes, and the stroke tool is terrible. It has a very strong smoothing effect, so the line basically just goes all over the place, and then it randomly streaks across the page and can't be undone with the undo button. That said though, the app has a good range of color choices and I'm impressed for it being free. If they fix the stroke tool, 5 stars easy.
2 stars: There are a few flaws. If you install this, save it frequently and screenshot when you're done. I had been working on some art for an hour, and before I could save it, the app closed and my progress was gone! This happened twice! Please fix this. Other than that, it's relaxing and I don't get bored of it. Just please fix the glitch, thank you!
2 stars: I loved this app. It's very relaxing. But they took away the picture...