My Pokemon Go has been running on iPhone for an hour, and it shows a nearby Pikachu (top-right at the 3 x 3 popup).
But if I start up Pokemon Go on my iPad next to my iPhone, and after a few minutes and now half an hour, it still doesn't show a Pikachu nearby.
So how come they can show different Pokemons, and which one should I look at? If I do activate an Incense, hoping to catch Pikachu, I might be activating it for nothing?