App Interface Guideline: Performance — Image Size & Cache. Keywords: Image resize cache. Platform: iOS/Android/React Native. Description: Use correctly sized and cached images. Do: Use Image component with proper resizeMode and caching. Don't: Load full-resolution images everywhere. Good Example: <Image source={{uri}} resizeMode="cover" />. Bad Example: <Image source={require('4k.png')} /> // small avatar. Severity: Medium.