The heart-shape is used to indicate sexual love; affection; and fitness, so much of which depends on the condition of that organ; and of course, the heart itself.
'Weird shape' conveys nothing at all to me.
Five circulating dots on the left side? I don't know.
Welcome to Android Central! If it's a notification icon in the status bar, swipe down the notification panel and long-press the icon, then App Info. If it's on someone else's phone, ask them to do it. Pretty simple to do.