Best Buy, Walmart and Frys have indoor antennas. Depending on how far you are from the broadcast towers and the location of your TV in your apartment in relation to the towers, I’d recommend either getting one with a built in signal booster, or adding a separate in-line signal booster.
Most manufacturers are selling designer flat antenna models, but I prefer rabbit ears.
In the end, it was cheaper and convenient to just add local TV channels to my Internet service.