Perry wants a new smart watch. Leo says it really comes down to what he's interested in. Does he want notifications or general fitness? Leo says that the Apple watch is not a good choice for Android users. Android Wear is a better option. With the Fitbit, he can get five days from it before he'd have to recharge. It also has a good heart rate monitor. It needs to use his phone's GPS.
Samsung's Gear S2 is excellent if he's using a Samsung phone. He shouldn't get the one that has a phone in it, though. It would be a big drain on battery life. There's a good article comparing the S2 and S3 at androidauthority.com.