App Interface Guideline: Forms — Auto Focus & Next. Keywords: autoFocus blurOnSubmit onSubmitEditing. Platform: iOS/Android/React Native. Description: Guide users through form fields with Next/Done flows. Do: Use onSubmitEditing to focus next input. Don't: Force users to tap each field manually. Good Example: onSubmitEditing={() => nextRef.current?.focus()}. Bad Example: // no onSubmitEditing, manual tap only. Severity: Low.