KoreTrak watch an internet connection, without actually needing to be connected to your phone. The cellular Apple Watch Series 5 carries a $100 premium over the standard version, and you also have to pay to add it to your phone plan—most carriers charge an additional $10 per month. Whether this convenience is worth it for you depends on what you plan to use your watch for. If you want to be able to stream music while you exercise, but you want to leave your phone back in the locker room or at home, a cellular connection can certainly come in handy. If you always have your phone on you, however, you can probably save the money and skip it. Battery Life You don't want a smartwatch with good battery life, right? Good, because you're not going to get it. Watches with full-color, smartphone-like displays, like the Apple Watch and Wear OS watches, only last for about a day on a single charge. Like your phone, .