So user interface is also a very important factor to be considered while making your final selection. You will always like to prefer a program with a simple and intuitive user-interface, which is easy to use. I don’t think you will prefer a voice changer that possesses a big library of voice options and sounds and many awesome features as well, but the user interface is very complicated.
Generally, a good voice changer software offers a good value for your money, and you will not regret later on having bought their paid version. Hence, the price is also a very important factor that you will need to consider. And, if you don’t want to have those restrictions, you will need to buy the premium or paid version. But generally, free versions have some limitations and restrictions.
However, some programs are free to use, and some offer a free trial version along with their paid versions. Price is a very crucial factor to be considered because you will not be able to purchase a program that is not in your budget. You can also consider that feature as an important factor while making your selection. Some software also comes with a collection of background sounds.