I typed up a spread sheet with my breeding matches and then just have to fill in what dates I had them paired, did I see a lock, that sort of thing. I've tried keeping it on the computer and thought about reptilescan but figure if my hands are always dirty from spot cleaning tubs I'm going to scribble it on a note pad to enter into the computer/app later then why not just type up nicer sheets. I have less than 100 snakes so it's not as much to track as big breeders.