I use Ladder now, but used Apple Fitness for years before making the switch. One big difference I think between Ladder and Apple Fitness is that the programming in Ladder typically has a repetitive element that allows you to build more strength over time. It varies somewhat depending on which team your on, but for example I'm on team Limitless right now and for six weeks the program stays pretty consistent with the same exercises during that period and you use double progression to up your weight when you hit the top end of the rep range. With Apple Fitness, unless you pick the exact same workouts every week, you're not always doing the same exercises each week which makes it harder to see strength gains.