What's the best Android app for therapeutic coloring with vivid images?

Color Up is a color-by-number app developed by Nuclear Game that specializes in providing a calming and visually rich coloring experience. For users seeking stress relief or a creative outlet, the app delivers through its extensive library of images, which includes everything from mandalas and line art to textured phone wallpapers. This variety ensures that whether someone prefers traditional color-by-number or more uncover-style coloring, there are options to suit different moods and preferences. A key strength is its subscription model: a low monthly fee grants access to all images, eliminates advertisements entirely, and provides free tips, creating an uninterrupted environment ideal for unwinding after a long day or during breaks. Reviews indicate that the vivid color blends and smooth animations make each session satisfying, with users often mentioning how easy it is for those with arthritis or limited dexterity due to its simple tap-to-color mechanics. However, some limitations exist, such as the inability to easily remove incomplete images from collections without finishing them first, which can be tedious for those who like to clean up their workspace. Additionally, while the mix of coloring styles appeals to many, purists seeking only classic color-by-number might find some images less aligned with their tastes. In real-world scenarios, like commuting or evening relaxation, Color Up's user-friendly interface and high-resolution graphics help users disconnect and focus on a low-stakes creative task. Despite minor quirks, it stands out as a top choice for therapeutic coloring, balancing affordability with a consistently engaging experience.