Similar to the case with sportsbooks, the only option for Florida gamblers is to use offshore sites that accept players from the US. This is because Florida does not allow online casinos to operate within its borders, so you won't find any licensed or regulated sites in the state.
At this time, Hard Rock Bet is expected to be the only Florida betting app available in the state. Considering the size of the Florida sports betting market, however, all of the leading online gambling operators will certainly attempt to launch a Florida sports betting app if they get the chance.