Need Recommendation the Strongest Indoor TV Antenna in US

I do not want to pay monthly fee to cable companies. Therefore, I opt for a strong indoor TV antenna (outdoor antenna is prohibited by the local community). I have spent $70 for an antenna that is supposed to be very strong in accordance with its advertisement. However, I still cannot get ABC, CBS, NBC due to week signal. Could you recommend a genuinely strong one? Thank you.

There is more to a quality signal that pure strength. Especially now that all "over the air" TV signals are digital.
You want the strongest clean signal you can get, which may be less that the strongest possible signal.

It depends on where you are. If you live in high rise apartments, or near water towers, you will have a ton of reflections that make selectivity the
most important criteria. Obviously, distance to the transmitting antennas is important, as is whether or not there are things between you. TV signals
are mostly line of sight.

I live in a single family home and it is in a residential area surronded with two-story houses for miles. No high rises or water towers. This is exactly the reason I wonder why I still cannot get CBS, ABC, NBC. "weak signal" is displayed on the TV screen on those channels.

Do you have any antenna now?
Even a $10 antenna will work well if you are not too far from the transmitting antennas.

Sometimes even a piece of cox cable can work.

Follow the usual rules for problem isolation here on the Ranch: what have you tried, what are the results, what changes can you make easily, etc.

This site will tell you what direction the local TV transmitters are. The position of the antenna makes a big difference. I built a diy tv antenna. When I put it next to the TV, I got about 10 channels. I moved it to a window in direct line of site with the transmitters and got over 40. Still nothing interesting on.