You can make your existing door hardware compatible with a keyless entry system by finding smartlocks according to your needs.
You can reattach your existing lock hardware to match with your home's design by installing the smart lock application.
Smartlocks can be easily controlled by smartphones after pairing them with Bluetooth.
You can also pair your lock by using the apps like, Apple HomeKit to unlock your smart lock.
Keyless entries are perfect for while you are having a large home for a get together parties for allowing your special guests.