In its native state, Pokémon GO Plus has a clip that allows you to attach it to your pocket or your belt, and weirdly, it takes a small screwdriver to actually allow you to attach it to the ‘90s-style cloth bracelet so you can wear it on your wrist.
The Plus buzzes in a more prolonged fashion when Pokémon appear, and pressing the button then will cue the 1…2…3 shake players are familiar with from the base game, and then the device will flash red or green depend on if you caught the Pokémon, or it fled.
Yes, it saves battery life, and I can imagine some instances where this would be useful where you can’t have your phone out (oddly, driving seems like one of the best possible uses for the Plus, which I’m sure Niantic isn’t encouraging), but if you like the game, it seems like you’re better off actually playing it than mashing this button whenever it buzzes.
Again, I know there are specific instances where this would prove useful and having your phone out is unwise or dangerous or you have just zero battery life and want to keep playing, but I feel like that would be pretty situational.
Examples: - The kind of Pokémon that are most likely to flee with the “one chance” system are generally ones that avid collectors will not want to miss.