You also need to make sure that the program does not require data that you do not collect. For example many programs require individual weaning weights, while many ranchers do not record individual weights. Take the time to decide what reports you would like to get from the software. There are as many different styles of reports as there is software available. Make sure the program you select will deliver what you need.
Some programs require that the cows be numbered in a certain way.
This may or may not be an issue for you. Some programs can be confusing in the way they handle the production cycle. Since cows are bred for next years' calf before this year's calf has been weaned, programs that are production cycle based, can become confusing if records are not kept up to date. Going back and entering past data into some programs can be confusing. Once you have made a checklist of what you need and want from a software program, you are ready to find out what is available.