apples need both sexes to breed. Females can store sperm and lay eggs 6 months later. The good thing is that they are pink, above the water line, and easy to remove. YOU completely control whether or not the eggs are allowed to hatch. (yep, I had some egg laying monsters!).
Nerites also need both sexes, they may have an egg every now and then (I've never seen one personally), but they will never hatch or mature.
Ponds lay eggs, it's disgusting, I keep having to scrape off my plants. So do ramshorns (you don't have a problem with breeders? c'mere Laki!).
Ponds do not require both sexes, I believe ramshorns do.
Trumpets (MTS - Malaysian Trumpet Snails) are live bearers. They breed like rabbits. And you will be forever removing them. (I've had everything but rabbit snails).