Use Counters in order to count your own things. By default there are 3 counters that you can change or remove. You can create your own counters as well.
At the Gear, change between counters using the bezel, To add 1 to the counter, just tap on it.
*** THIS APP NEEDS A SAMSUNG GEAR APP from Gear Manager - Samsung Gear Apps called Counters for Gear S2. Go there and install it first. This App will be installed automatically after that. ***