As of 2025, most major apps (Banking, WhatsApp, Spotify, Chrome) require at least Android 6.0 (Marshmallow) or 8.0 (Oreo). KitKat is virtually dead in the app ecosystem.
Pie introduces gesture navigation, a redesigned notification shade, adaptive brightness, and “Slices” (interactive UI elements in Google Search). upgrade android 4.4.2 to 9.0
Android 4.4.2 has not received a security patch since 2015. Upgrading to 9.0 gives you patches up to 2021, plus modern security features like encrypted backups and biometric authentication frameworks. As of 2025, most major apps (Banking, WhatsApp,