Auslogics Disk Defragmenter 2.11 is a reliable and effective disk defragmentation tool that can improve the performance of your Windows computer. While the free version provides basic features, the Pro version offers more advanced features and automatic defragmentation. If you're looking to purchase a license key, make sure to buy it from the official Auslogics website or authorized resellers to ensure authenticity and support.
iDefrag has long been discontinued, with many of its functionalities incorporated into newer Mac file systems (APFS) or rendered less necessary due to modern SSD technology. Compatibility: idefrag 211 license key link
Regarding the license key, I couldn't find any official links. Typically, you can purchase a license or get a free trial from the official IObit website or authorized resellers. Auslogics Disk Defragmenter 2