The Play Store APK itself is just the front-end interface. If you only update the Play Store APK while running outdated Play Services, you will see errors like “Unfortunately, Google Play Store has stopped.”

Most KitKat-era devices use armeabi-v7a (32-bit ARM). Ensure you don't download 64-bit (arm64-v8a) variants, as they will fail to parse.

By default, Android blocks the installation of apps from outside the Play Store for security.