The problem with watering every day is the roots will not grow deep. You want to water deeply, and then wait, and then water deeply again. Especially with corn, which tends to have shallow roots anyway, and is so tall, you want to encourage those roots to go as deeply as possible to anchor the plant.
BUT on the other hand, when they are just germinating and starting to grow, you have to give them more water, because the roots are only a few inches long, and if they dry out completely for too long at this age it will stunt them or kill them. And corn loves water. SO I would say, stick your finger in the soil as far as it will go, and if it feels DRY water it DEEPLY. Not a sprinkling, you want a lot of water in there. That way, even when the top dries out tomorrow, it will still have plenty of water. That will get those roots growing deep.
After they are bigger, go with the one inch a week. Around here that means we have to water almost every week. I do it once a week unless it is really hot, and them some plants, like lettuce and the root veggies, need it more often.
One inch of water = 2 gallons a square foot.
Now, I am sure that is more information on watering then you ever wanted, but once I get thinking, it goes and goes, on and on!