I'm afraid that the icon you have ringed is really indistinct (the whole image has so many artifacts that it looks more like a sketch than a real photo: was this massively zoomed-in?).
In any case, there are literally millions of apps, so even with a good image most of these queries go unanswered. Your best bet if you want to know is probably to ask the person whose phone this is (and I know when I say that that most of the people who ask these questions - which we get daily - do not want to do that, but I'm afraid that is the truth).