Active Partition Recovery offers a range of features that make it a popular choice among users:

If you cannot afford the $50, use free open-source recovery tools. They do not need a "registration key" at all.

When you purchase a license, you receive a and a Registration Key . You enter these into the "About" or "Register" section of the software to unlock the full version. The Danger of "Free" or "New" Registration Keys Online

If you're not ready to purchase a registration key, you can download a free trial version of Active Partition Recovery. The trial version allows you to scan for lost partitions and preview recoverable files, but it doesn't allow you to save recovered data.