The icon is a picture of the logo for split. The icon has a large letter U shape. Each end of the U shape has an arrow pointing up. In the bottom middle of the U shape, there is a line extending downward.
This is a Split 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 13,700 icons, all in the same style and quality.