NEW YORK ­— Jen Hughes used to have the time to hunt for online coupon codes and ­refresh her Web browser to see if the clothes she wanted had gone on sale yet. But after she had her first child, she said, trying to track e-commerce prices had to go.

‘‘I spend my day chasing my daughter around, so I don’t have the luxury of sitting at my computer,’’ said Hughes, 29, of Reading, Mass. Many sites ‘‘have sales every other day, but I don’t have time to go on and see if the things I actually want have made it onto the sale yet.’’