The 2.3 version of Dr. Cleaner for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The application lies within System Tools, more precisely System Optimization.
From the developer:
Dr. Cleaner is the only free app that offers memory optimization and disk cleaning to help you speed up your Mac. It also features a large-file scanner that finds all large files (customizable size) on your Mac's disk. And now Dr. Cleaner has a brand new user interface, making it even simpler and easier to use.
You may want to check out more software for Mac, such as Clean Run Course Designer 4, Dr.OS Disk Cleaner or Dr. Safety: Antivirus App, which might be related to Dr. Cleaner.
System Optimization
Drivers