What's a good Android app for relaxing coloring that might help with memory or focus?

Family Love Coloring Book is an uncomplicated digital coloring application developed by FunKidStudio that serves users seeking a simple, calming activity. Its core appeal lies in providing a distraction-free environment for mental relaxation. The app features a collection of family and love-themed templates, such as hearts, animals, and decorative patterns, which users can color using a basic palette and brush tools. For individuals exploring coloring for cognitive support, as mentioned in some user reviews, the app offers a straightforward, low-pressure creative outlet. Its primary strengths are its zero-cost model, offline functionality, and the absence of complex menus that could frustrate certain users. However, the toolset is relatively basic, lacking advanced features like gradient fills or layer support found in more professional art apps. Some user feedback suggests the ad-supported model can occasionally interrupt the flow. Despite this, for casual use aimed at occupying the mind or providing a brief respite, it fulfills a specific niche effectively.