I have the Winegard Amp mentioned above. Sure you can use your smartphone or tablet to find out where the antennas are. But I can easily dial in the best direction just by looking at the meter which is on the wall right next to where I stand to turn the antenna. I turn the antenna until I see the highest read out and then set the TV to perform an auto-tune. A few minutes later the stations are ready to watch.
Mark, Jenny, Adam & Lucy
2013 Rockwood Roo 233S
2015.5 Silverado 2500HD CCSB with Duramax/Allison