iOS vs. Android App UI Design: The Complete Guide
Mobile User Experience: Limitations and Strengths
Icon size
https://blog.icons8.com/articles/choosing-the-right-size-and-format-for-icons/#:~:text=Standard sizes for all system,64×64 px %402x
https://developer.apple.com/design/human-interface-guidelines/icons
material design和human interface design guideline里也有