Over-the-air (OTA) are channels that you can pick up with just an antenna. TV Fool will show you which channels you can receive at your house with an antenna and the measures needed for them to come in clearly. I remember trying to play with our antenna in the 1980’s hoping that I could clear up the signal and get rid of the static, digital channels don’t have static. They are either clear or unavailable.
These all average about $10/mo each.
Be careful with this option. This is the quickest way to infect your computer or cause other problems. You really need to know what you are doing, and sometimes it’s really not worth avoiding any of the options mentioned above.