Interactive elements must be at least 1cm × 1cm (0.4in × 0.4in) to support adequate selection time and prevent big-finger errors. Adequately sized touch targets are critical for using an interface — they will ease users' experience! Users often experience frustration caused by small touch targets: visible, yet unresponsive to their taps — or worse, forcing them to accidentally trigger nearby links. Here are some useful links for you:
Touch Targets on Touchscreens
As a new parent, I increasingly find myself using my smartphone as my primary computer. Jotting down a note, selecting next week's meal delivery kits, shopping online, and tracking my child's eating and sleeping patterns all need to happen one-handed, quickly, while holding this tiny new human.
Hick's Law | Laws of UX
The time it takes to make a decision increases with the number and complexity of choices. Simplify choices for the user by breaking down complex tasks into smaller steps. Avoid overwhelming users by highlighting recommended options. Use progressive onboarding to minimize cognitive load for new users.