How do you keep track of your collection?

I'm just curious to how the people in this group keep track of their movie collections.

I use the CLZ Movies App. It started off at $14.99 a few years ago but has gone up to $19.99 a year. I haven't found anything that does a better job than CLZ.

I wish it had a "lend out" option to track anyone who has borrowed my films though.