The best indoor antenna for HD use is the Winegard Flatwave, according to Digital Trends. This antenna is around $50, as of 2015, and it is capable of picking up signals from up to 30 miles away.
If looking for a more affordable option, the Mohu Leaf Metro is around $25 and is also a top performer. It can pick up signals around 25 miles away and still deliver a full 1080p HD transmission. The most affordable option, but still a top performer, is the Channel Master Flatenna. This HD indoor antenna is around $10 but has a lower range, so it is best for those who live near urban areas where transmissions are sent from.