What's the best iOS app for a relaxing coloring game that works offline?

Pixel Art － Color by Number is a strong contender for users seeking a straightforward, offline-capable coloring experience. The app's core mechanic is simple: users tap numbered sections to fill them with corresponding colors, gradually revealing detailed pixel-art images ranging from animals and landscapes to popular characters. This process requires minimal cognitive load, making it suitable for stress relief during commutes, waiting rooms, or before bed. A significant library of pictures is available for free download, after which they can be completed entirely offline. Daily updates and new themed collections provide consistent fresh content. The interface is clean and the color palette is generous, though some of the most intricate or licensed artwork is locked behind a premium subscription. Reviews indicate the app is particularly effective for winding down, with users praising its ability to occupy hands and mind without demanding intense focus. A minor drawback is the presence of banner ads in the free version, which can be removed via purchase. For a no-fuss digital coloring book that doesn't rely on a constant data connection, this app delivers a reliable and expansive experience.