Idea of Comet Icon
It's a logo of a circle in the lower left and then around the circle, which is the comet, is a large image enveloping the circle of the fire trail which is circular on the lower left but going to the upper right becomes the tail with three sharp points coming out.
This is a Comet icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,900 icons, all in the same style and quality.