While Pokemon Go is not yet available worldwide, users from Australia, New Zealand, and Japan have said the app can be picked up in their countries. They've coded in hard limits to keep it away from a bunch of things they don't want you playing on - tablets, Chromebooks, Android TV etc. The Pokemon Go Plus Device which is a Wrist Watch will be available soon as well by the 2nd week summer of August. If you often find yourself playing Pokemon Go for more than three hours at a time, it may be time to invest in an extra backup battery.
I have a sneaking suspicion that it has a higher frequency of spawning pokemon once you have clocked up some distance in moving. In cooperation with Android and Apple company using a Bluetooth Low Energy, using Pokemon Go Wristwatch Device it will give information about nearby pokemon, it will blink light or vibrate and you can catch the Pokemon by pressing the center button.