Nerites are fairly good algae eaters, but they will leave eggs everywhere. The eggs won't hatch, but they are an eyesore and very difficult to remove.
The better question is where your algae is coming from. Some algae is expected and is healthy for the tank. Unless it's a problem type of algae, or all over the tank viewing side, it could probably be left.
If it's on the tank side but is otherwise not a problem, simply cleaning the inside of the tank glass will take care of the problem for you.
A better option for algae control is to make sure you are not lighting too highly too often, and to increase the number of plants in the tank. The algae is a sign that you have too much light (lights on too long) and/or too many nutrients in the tank that aren't being used. Fast-growing stem plants or an abundance of slow-growing plants will out-compete algae for nutrients and it will clear up on its own.
You also might not be fertilizing enough. Plants will only use resources as they are available in balance. Algae needs different resources.
At any light level, your plants use a certain amount of macro and micro nutrients. If you are not fertilizing to add these nutrients, your plants will use what is available in balance - they will use so much of the "macro" nutrients, which causes them to need so much of the "micro" nutrients. If your nutrients are not in balance, some of one or the other will be left over. That's when algae shows up, using ANY nutrient available (different types of algae will use different nutrients) to take up the slack.
The best way to get rid of algae is to do one of two things:
1. Decrease light
2. Increase fertilization AND/OR the number of plants to out-compete the algae and bring balance
All that said ... what is your lighting schedule? Tank parameters? Types of plants? Can you post a photo?
I realize my answer is long and might be confusing (it is overly simplified and sometimes that's actually more confusing), but another tank inhabitant is another tick up on the bioload (more nutrients being added through waste), and another mouth to feed. After all, what if you run out of algae? What if the algae is not a type the snail likes? Then you'll just have another mouth to feed and mess to clean up!
I blame spelling mistakes on my iPad. You should too!