NEEDS IMPROVEMENT WHEN APP IS OPEN AND RUNNING

The game is fun, the problem is when I first open the game Pokémon will show up and often pop up but then as soon as I go to tap on it they all disappear and everything goes away for awhile, sometimes they will come back and disappear again. Its also unfair, I live in a country environment, all my city friends sit on there couch and catch awesome Pokémon if I walk down the road I might be lucky to get a eve. Also, why isnt there a why to convert k/m most of us are in the USA and use the mile system.

Joshthatguy about Pokémon GO, v1.37.2