The trial version of every variant of Avalanche is a fully functional copy of the application, not limited in time, but limited to migrating 100 images and 100 videos.
Avalanche for Lightroom, Avalanche for Luminar and Avalanche Unlimited require macOS 10.14 or later and run fine on Catalina.
Avalanche is compatible with:
You need around 145 MB of free space, 4GB of memory (8GB recommended) and enough space to accommodate the converted libraries.
A working copy of Apple Aperture or Lightroom is not required to migrate libraries as Avalanche opens those libraries natively.
Once purchased, you will receive a link to download Peakto.
You then have a trial period to test Peakto:
If you cancel within 7/30 days of your order (depending on the trial length), you will receive a full refund.