Apparently ADS-B Exchange has better coverage, and includes more military planes.
I don't know if the Exchange tracks weather balloons and/or aeronautical science experiments.
I used that site for the first time last night and found it much more useful for my needs than FlightRadar24. And much, much easier to find aircraft for which I was looking.
By the way, trolling here, the GOP speaks out of both sides of their collective mouth, demanding the president shoot down UFO's and then condemning him when he did.
The president, on the other hand: put taxpayer's money where his mouth was/is, and, oh, by the way -- scored four out of four, though it apparently took the USAF five shots.
I'm still looking for someone in the GOP who has big ideas for the country, like the ones JFK and LBJ had: "man on the moon" and "wildflowers along Texas highways."