Hungry Cat Nonogram [Google](https://play.google.com/store/apps/details?id=com.tuesdayque...) [iOS](https://apps.apple.com/us/app/hungry-cat-nonogram/id73774447...) was always my favorite of these as it had full-color puzzles.

It was also called "Hungry Cat Picross" until Nintendo trademarked "Picross" and went after everything branded with it. This actually caused me to learn about the nonograms as I had assumed the type of puzzle was always called picross.