Get an HDHomerun box. It is a digital tuner that sits in your home network. You need to connect the box hard to your network (usually on the router) and run an antenna to HDHR.
HD Homerun does not have an official Apple TV app, but there is an app called Channels that works very well. I think channels cost around $ 20 for Apple TV, but it’s a one-time purchase. It is a high quality app that receives constant updates from the developer. It shows a complete program guide, and you can even pause and rewind live TV.
Channels also has a subscription service that allows you to turn a Mac or PC into a DVR. This software works well, but you need a machine that is always on and with quite a lot of disk space. If you go the subscription route, it̵