Crashing All The Time

I used to love Next Stop, but something is terribly wrong- for the past two weeks, every single time I try to open it, it crashes. My updates are current, Ive tried closing both the app and my iPhone, but it makes no difference- I get kicked out. Please advise; I need for this app to work, thanks! If resolved, Id give you five stars, but I cant even get in.

Cubachik about NextStop - NYC Subway, v2.4.4