I use simple spreadsheet with dates hours, prey size and weight, start of shedding when it was complete and if it was whole or not, also length and weight of the snake and when they defecate. I also log when their enclosures were cleaned. Also strain hatch date price etc. Not to forget any health problems or mites etc. Misc notes are there too. It provides me with simple view selecting by particular search and also graphs of the progress. And i use both computers and phone/tablet for inpue. Oh almost forgot I also log when are they bathed.