App Interface Guideline: Forms — Keyboard Type. Keywords: keyboardType returnKeyType. Platform: iOS/Android/React Native. Description: Use appropriate keyboardType and returnKeyType. Do: Match email/tel/number/search types. Don't: Use default keyboard for all inputs. Good Example: <TextInput keyboardType="email-address" />. Bad Example: <TextInput keyboardType="default" />. Severity: Medium.