My Apple Watch falls off often . Today it fell and cracked . I’ve had it 4 months now . The band that it comes with isn’t secure .
If you're putting the band on the correct way, and if it still "falls off often", I'd ask how tight you're getting it? I could see it coming apart if you're putting it on way too tightly. You should be able to comfortably get a finger under the band when it's on. Beyond that, it sounds like something is really wrong. I have 20+ bands and change them daily and have NEVER had the watch fall off or even come close. The vast majority of those aren't even Apple bands, but third-party stuff off Amazon. I can't say I've ever run across a band that I would describe as "not secure".
If all else fails, look into a Sport Loop and some other type of band that fastens in a more secure fashion. I can't imagine your watch would "just fall off" with a Sport Loop since unlike the Sport Band, the loop is just a single piece.