SuperDuper! Disk Cloner

I bought the disk cloning software, SuperDuper! in 2004 and have been receiving updates for the past 20 years without ever being charged an additional dime. I use it alongside Time Machine to create a bootable backup of my MacBook's hard drive. It has a clearly understandable user interface where it explains everything in plain language so there is never any ambiguity about what operation you are choosing to do. 

Features

Scheduled backups - set it and forget it
Incremental Smart Backups - No need to clone your entire disk again, just backup what has changed since you last ran SuperDuper!

Snapshots - You can choose to make a copy of your hard drive as it existed at a point in the past based on snapshots created by macOS. This is deal for returning your drive to the state it was in prior to an aborted update or file deletion event.
SmartWake - ensures your backups happen whether your Mac is awake or asleep

You can download and use SuperDuper! to make unlimited disk clones for free. To unlock its advanced features you can purchase it for $27.95 and receive updates forever.

(EDIT: The Rosetta version works on Apple Silicon, but to get a native version if you have a pre-2109 license, there is a charge. If you buy the current version, you can download older versions)