The download is free: install Numento, try it with your own collections, and buy a licence whenever you're ready. The free version has no time limit.
Version
For an older system, or to find a previous version.
macOS 11 or later, Apple M1 to M3 chips
macOS 10.13 or later
Windows 10 and 11, 64-bit
32-bit macOS
One licence, no subscription, valid on Mac and Windows.